TDEE, BMR, sleep-cycle, and daily water-intake planning
A local-first planning topic that connects TDEE, BMR, BMI, healthy-weight range, sleep-cycle timing, and daily water-intake estimates without medical claims.
Chakan
A full-category lookup toolbox for IP addresses, domains, websites, SEO, AI search visibility, text encoding, prompts, and everyday checks.
Featured
Muscle group explorer
Pick a muscle area to find useful exercises, or select an exercise to see its primary and secondary muscle activation.
Open toolMuscle mapHeat zonesExercise picksTraining notes
Popular lookup tools
High-frequency tools with clear intent and strong search demand are prioritized first.
AI prompt case lookup
Turn a simple need into reusable prompt examples for ChatGPT, Midjourney, Stable Diffusion, FLUX, writing, design, and development.
LookupToolChakanAI Prompt Token 预算查看
用结构化输入查看 Prompt 长度、近似 token 预算、输出预算、答案来源 Prompt token 和证据卡精简建议，适合 DeepSeek、Kimi、豆包、通义、元宝、文心、GLM 等公开页面型 AI 工作流 and answer-source prompt token planning.
PromptToken预算Keyword question extractor
Extract how, what, why, pricing, troubleshooting, and AI-search citation questions from pasted keyword lists so you can plan FAQs, direct answers, and AI/GEO content.
LookupToolChakanSearch intent cluster
Group pasted keywords into informational, troubleshooting, comparison, transactional, navigational, local-service, China-search, and AI/GEO intent buckets for page-shape planning.
LookupToolChakanKeyword modifier cluster
Cluster price, tutorial, template, comparison, local, platform, audience, freshness, China-search, and AI/GEO modifiers from pasted keywords to plan long-tail pages.
LookupToolChakanKeyword topic cluster
Cluster pasted keywords by recurring core topic, shared root phrase, AI/GEO questions, and variant directions so you can see which topic families deserve tool pages, FAQs, llms.txt entries, or hubs first.
LookupToolChakanKeyword funnel stage
Classify pasted keywords into problem discovery, solution research, evaluation, action, and retention stages to decide content order, AI/GEO answer depth, CTA strength, and page shape.
LookupToolChakanAI/GEO question intent analyzer
Analyze pasted questions for AI search citation readiness, China AI answer surfaces, answer formats, llms.txt actions, evidence needs, and page structure planning.
LookupToolChakanBanned and risky claim checker
Scan pasted ad copy, landing-page drafts, and product claims locally for absolute, guaranteed, ranking, authority, and earnings-risk phrases before publishing.
LookupToolChakanMuscle group explorer
Find exercises by muscle area, or select an exercise to inspect the main and secondary muscle groups.
LookupToolChakanGlobal travel spots and itinerary guide
Look up popular attractions, photo spots, food, local experiences, image and video source links, and simple travel recommendations for countries and cities worldwide.
LookupToolChakanCurrent IP lookup
View your current public IP address and basic request information.
LookupToolChakanDNS lookup
Inspect common DNS records such as A, AAAA, CNAME, MX, NS, and TXT.
LookupToolChakanDNS propagation checker
Compare DNS records across multiple public resolvers and check whether a target value has propagated.
LookupToolChakanAuthoritative NS difference checker
Query authoritative name servers directly, compare multi-NS record consistency, inspect SOA serial drift, and see how public resolvers align with the authoritative result.
LookupToolChakanDNSSEC deep health checker
Inspect DNSKEY, DS, RRSIG, algorithms, digest types, TTL and resolver consistency to verify whether the parent-child DNSSEC chain appears complete.
LookupToolChakanWHOIS domain lookup
Inspect public domain registration, registrar, status, dates, and nameserver information.
LookupToolChakanIP geolocation lookup
Look up approximate country, region, city, ISP, ASN, and timezone information for IPv4 or IPv6 addresses.
LookupToolChakanIPv4 subnet calculator
Calculate network address, broadcast address, host range, wildcard mask, and usable host count for IPv4/CIDR.
LookupToolChakanIPv6 subnet calculator
Inspect IPv6 prefix, network range, and address capacity from CIDR notation.
LookupToolChakanHTTP headers checker
Use this http headers checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanRedirect chain checker
Trace HTTP redirects, final URL, status codes, hop count, protocol or host changes, and SEO risks.
LookupToolChakanHTTP cache and CDN edge checker
Inspect Cache-Control, Age, Vary, ETag, CDN cache hit or bypass signals, and edge-cache optimization advice for a URL.
LookupToolChakanStatic asset cache strategy checker
Sample a page's CSS, JavaScript, images, fonts, and icons to inspect TTL, immutable, ETag, compression, and broken asset risks.
LookupToolChakanPage resource 404 and performance checker
Sample page resources to find broken assets, redirects, mixed content, render-blocking scripts, missing image dimensions or alt text, and large files.
LookupToolChakanThird-party script governance checker
Sample third-party scripts on a page and inspect SRI, crossorigin, render-blocking behavior, version hints, cache policy, and supply-chain governance risks.
LookupToolChakanGzip and Brotli compression checker
Check whether a URL response enables gzip, brotli, or related content compression and inspect Vary, cache, and content-type signals.
LookupToolChakanOrigin exposure audit
Audit direct DNS exposure, CDN edge hints, HTTP to HTTPS redirects, security headers, and Server or X-Powered-By header leaks.
LookupToolChakanCORS header checker
Check CORS preflight and read-response headers for a URL, Origin, method, and custom request headers without sending write requests.
LookupToolChakanCSP policy checker
Inspect a URL's Content-Security-Policy and Report-Only headers, then flag risky default-src, script-src, object-src, base-uri, and frame-ancestors settings.
LookupToolChakanReferrer-Policy generator
Generate a Referrer-Policy header with Nginx, Apache, Next.js, and HTML meta snippets for privacy and analytics tradeoffs.
LookupToolChakanPermissions-Policy generator
Generate a Permissions-Policy header for camera, microphone, geolocation, payment, USB, Bluetooth, fullscreen, and clipboard permissions.
LookupToolChakanCache-Control generator
Generate a Cache-Control header with public/private scope, max-age, s-maxage, stale-while-revalidate, stale-if-error, and deploy-ready snippets.
LookupToolChakanSecurity header recipe builder
Generate a deploy-ready baseline set of site-wide security headers, including HSTS, X-Frame-Options, Referrer-Policy, Permissions-Policy, and cross-origin isolation defaults.
LookupToolChakanSecurity headers audit
Audit a live URL for deployed HSTS, CSP, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, COOP, CORP, cache, and exposure signals.
LookupToolChakanBrowser privacy and fingerprint checker
Inspect User-Agent, language, timezone, screen, hardware, storage, Canvas, and WebGL fingerprint signals locally in the browser without uploading the result.
LookupToolChakanUser-Agent 解析查看
查看浏览器 User-Agent 字符串里的浏览器、系统、设备类型、渲染引擎和爬虫特征。
User-Agent浏览器爬虫SEO meta checker
Use this seo meta checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanTitle, H1, and meta consistency checker
Check whether a page title, H1, meta description, and Open Graph copy describe the same topic, with length, mismatch, and AI-summary clarity warnings.
LookupToolChakanInternal link analyzer
Inspect one page's internal links, anchor-text quality, repeated targets, nofollow usage, and navigation versus main-content link mix for search and AI crawler discovery.
LookupToolChakanHeading outline checker
Inspect a page's H1-H6 outline, skipped heading levels, repeated headings, empty headings, and main-content heading distribution.
LookupToolChakanHreflang and canonical checker
Check page canonical, hreflang, HTML language, and international SEO consistency.
LookupToolChakanCanonical and hreflang batch checker
Batch-check multilingual pages for canonical targets, hreflang self references, reciprocal links, and language-code consistency.
LookupToolChakanRobots and AI crawler checker
Use this robots and ai crawler checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanSearch indexing entry audit
Audit a site's homepage indexability, robots.txt, sitemap.xml, llms.txt, and Googlebot, Bingbot, Baiduspider, or AI crawler access in one structured report.
LookupToolChakanRobots and sitemap cross-checker
Check one URL against robots.txt, sitemap.xml, canonical and noindex signals for Googlebot, Baiduspider, and AI crawler indexing diagnostics.
LookupToolChakanIndex exclusion reason checker
Diagnose Google Search Console, Baidu indexing, and AI visibility exclusion causes such as redirects, alternate canonical pages, noindex, robots blocks, and crawled or discovered but not indexed states.
LookupToolChakanGSC exclusion pattern playbook
Turn a cluster of Search Console or indexing-exclusion URLs into a repair plan by reason, page type, sitemap policy, canonical signals, sample URL patterns, and China search or AI GEO entry signals.
LookupToolChakanAccess log SEO intent miner
Paste access logs to separate effective human page views from scripts, scanners and crawlers, then summarize top tools, query terms, status-code loss, and actionable long-tail SEO candidates.
LookupToolChakanSitemap diff and stale URL auditor
Compare current and baseline sitemaps, then sample URLs for status, redirects, noindex, and canonical mismatches to surface stale or invalid targets that waste search, Baidu, and AI crawler attention.
LookupToolChakanRobots.txt generator
Generate a robots.txt draft from default policy, allow or disallow paths, sitemap URLs, host rules, and common AI crawler blocks.
LookupToolChakanXML sitemap generator
Use this xml sitemap generator tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanSERP snippet preview
Use this serp snippet preview tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanUTM URL builder
Build tracked landing-page URLs with normalized UTM parameters, parameter previews, and naming warnings for campaigns and channel attribution.
LookupToolChakanJSON Schema generator
Infer a JSON Schema draft from example JSON so you can model payloads, configs, and interface docs faster.
LookupToolChakanJSON to TypeScript generator
Generate TypeScript interfaces and type aliases from example JSON in the browser for payload modeling, mocks, and frontend typing.
LookupToolChakanJSON to Zod schema generator
Generate Zod schema drafts from example JSON in the browser for TypeScript runtime validation, API payloads, and AI output contracts.
LookupToolChakanJSON to Golang struct generator
Generate Golang struct drafts with json tags from example JSON in the browser for backend payload modeling and API debugging.
LookupToolChakanJSON formatter
Use this json formatter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanJSON deep diff
Use this json deep diff tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanJSON diff and patch viewer
Generate and apply RFC 6902 style JSON Patch operations (add/remove/replace) to review payload changes and migration safety.
LookupToolChakanURL encode and decode
Use this url encode and decode tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanURL query parameter diff
Compare two URLs or query strings to find added, removed, changed, and unchanged parameters without requesting the URL.
LookupToolChakanURL query normalizer
Normalize a URL or query string by sorting parameters, deduplicating repeated keys, and optionally dropping empty values to get a stable copyable query.
LookupToolChakanURL list extractor and deduper
Extract URLs from pasted text, logs, tables, or documents, deduplicate them, summarize domains, and warn about sensitive query parameters locally in the browser.
LookupToolChakanURL query key extractor
Extract query parameters from many URLs or logs, then summarize keys, value samples, UTM tags, duplicate keys, and sensitive parameter risks locally in the browser.
LookupToolChakanUTM parameter cleaner
Remove UTM and common ad-tracking parameters from one or many URLs, then summarize removed keys, kept keys, and share-safe cleaned links locally in the browser.
LookupToolChakanBase64 encode and decode
Use this base64 encode and decode tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanTimestamp converter
Use this timestamp converter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanUnix timestamp converter
Use this unix timestamp converter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanMD5 hash viewer
Use this md5 hash viewer tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanSSL certificate checker
Use this ssl certificate checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanSitemap checker
Use this sitemap checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanStructured data checker
Use this structured data checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanWord count
Use this word count tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanWord frequency
Use this word frequency tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanKeyword density and readability
Measure keyword coverage, density, text structure, and readability signals for content review.
LookupToolChakanWebpage keyword density checker
Check one public webpage for keyword density, title coverage, first-paragraph coverage, and visible-text topic concentration.
LookupToolChakanWebpage source viewer
Fetch one public webpage to inspect status, head tags, structured-data clues, framework hints, and raw HTML source without executing page scripts.
LookupToolChakanCrawler source compare
Compare browser, search crawler, and AI crawler user-agent views for one URL, then surface status, redirect, canonical, noindex, and source-signal mismatches.
LookupToolChakanHTTP status checker
Check one public URL for final HTTP status, redirect chain, key response headers, Baidu verification file readiness, release troubleshooting, and sitemap.xml.gz canonical redirect diagnostics.
LookupToolChakanRoute trace result explainer
Parse pasted traceroute, tracert, or mtr output locally and explain hop latency, timeout patterns, packet-loss clues, and the next troubleshooting priority.
LookupToolChakanRandom number generator
Use this random number generator tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanText case converter
Use this text case converter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanURL slug generator
Use this url slug generator tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanFullwidth and halfwidth converter
Convert fullwidth and halfwidth characters for OCR cleanup, spreadsheet imports, deduplication, and mixed Chinese-English text normalization.
LookupToolChakanString HEX converter
Use this string hex converter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanText replace
Use this text replace tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanText filter
Use this text filter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanJSON5 formatter and validator
Use this json5 formatter and validator tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanJSONPath viewer
Use this jsonpath viewer tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanJSON Pointer viewer
Resolve a JSON Pointer against pasted JSON to inspect one exact field, array item, or root node with a path trace.
LookupToolChakanJSON key sorter
Sort JSON object keys in ascending or descending order, recursively when needed, then copy formatted or minified output.
LookupToolChakanJSON to Markdown table converter
Use this json to markdown table converter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanJSON flatten and unflatten converter
Flatten nested JSON into dot-path key/value pairs or rebuild dot-path JSON back to nested objects in the browser for config migration and data cleanup.
LookupToolChakanJSON key renamer
Rename JSON keys in bulk with naming-style conversion or custom mapping rules, with nested object and array support.
LookupToolChakanJSON Schema validator
Use this json schema validator tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanFile hash checker
Use this file hash checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanCRC/BCC/LRC checksum calculator
Use this crc/bcc/lrc checksum calculator tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanHMAC calculator
Use this hmac calculator tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanYAML and JSON converter
Convert YAML to JSON or JSON to YAML in the browser for configs, API examples, and documentation cleanup.
LookupToolChakanCSV and JSON converter
Convert CSV to JSON or JSON to CSV in the browser with delimiter detection, header handling, and preview rows for imports and docs.
LookupToolChakanCSV table viewer and validator
Preview CSV as a table and validate delimiter, headers, empty rows, duplicate headers, and uneven column counts in the browser.
LookupToolChakanCSV column extractor and reorder tool
Extract selected CSV columns by name, index, or range, reorder fields, preview the cleaned table, and export a new CSV locally in the browser.
LookupToolChakanCSV column renamer and header normalizer
Rename CSV headers by column name or index, normalize field names to common cases, preview the mapping, and export a cleaned CSV locally in the browser.
LookupToolChakanCSV row filter and condition cleaner
Filter CSV rows by column name or index with equality, contains, numeric comparison, empty checks, or regex, then preview and export the matched rows locally.
LookupToolChakanCSV column type inference and schema draft tool
Profile CSV columns to infer integer, number, boolean, date, URL, email, and text types, then generate JSON Schema and SQL draft definitions locally in the browser.
LookupToolChakanJSON key path extractor
Extract JSON key paths with node types, depth, and path formats to speed up field inventory and mapping preparation.
LookupToolChakanJSONL and JSON converter
Convert JSON Lines to a JSON array or JSON arrays to JSONL in the browser, with per-line validation for logs, datasets, and batch APIs.
LookupToolChakanINI and JSON converter
Convert INI to JSON or JSON to INI in the browser with section support, duplicate-key diagnostics, and config cleanup hints.
LookupToolChakanTOML and JSON converter
Convert TOML to JSON or JSON to TOML in the browser with table, array, and scalar summaries for config cleanup.
LookupToolChakanBase32 and Base58 codec
Encode text to Base32 or Base58, and decode Base32/Base58 values with a HEX byte preview.
LookupToolChakanIP number converter
Use this ip number converter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanIPv6 compress and expand
Expand and compress IPv6 addresses to inspect their canonical text representation.
LookupToolChakanCIDR aggregation checker
Merge IPv4 CIDR ranges into the smallest equivalent CIDR list for network whitelist cleanup.
LookupToolChakanMIME type lookup
Use this mime type lookup tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanPort and protocol lookup
Use this port and protocol lookup tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanPort checker
Use this port checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanJWT decoder
Use this jwt decoder tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanMarkdown and HTML viewer
Use this markdown and html viewer tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanSQL formatter
Use this sql formatter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanSQL table and field inspector
Use this sql table and field inspector tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanSQL IN list builder
Use this sql in list builder tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanSQL VALUES and INSERT builder
Convert CSV, table rows, or pasted data into SQL VALUES and INSERT INTO statements, with string escaping, NULL handling, column checks, and copyable output.
LookupToolChakanSQL CREATE TABLE generator
Generate CREATE TABLE DDL from a field list for MySQL, PostgreSQL, SQLite, or generic SQL with primary keys, defaults, comments, and review warnings.
LookupToolChakanSQL WHERE condition builder
Generate SQL WHERE, SELECT, and COUNT query conditions from filter rows with IN, BETWEEN, LIKE, NULL checks, escaping, and parameter-binding warnings.
LookupToolChakan.env formatter
Format .env environment variable text and inspect normalized key/value pairs, duplicates, and suspicious lines.
LookupToolChakan.gitignore generator
Generate a .gitignore draft from common project stacks, IDE choices, operating-system files, environment patterns, and extra custom rules.
LookupToolChakantsconfig generator
Generate a tsconfig.json draft from runtime, module system, strictness, aliases, and include or exclude scopes for TypeScript project setup.
LookupToolChakanDeployment config generator
Generate deployment config drafts for Docker, PM2, Nginx, GitHub Actions, or Vercel from framework and server parameters.
LookupToolChakan.env template companion
Generate .env.example and multi-environment placeholder packs with a variable matrix that separates browser-exposed values from server-only secrets.
LookupToolChakanDeployment rollback checklist
Generate deployment rollback checklists with preflight checks, rollback triggers, step-by-step recovery actions, and post-rollback verification.
LookupToolChakanPEM certificate parser
Parse PEM X.509 certificate text to inspect subject, issuer, validity, SAN, fingerprints, and chain blocks.
LookupToolChakanURL parser
Use this url parser tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanHTTP status code lookup
Use this http status code lookup tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanNumber base converter
Use this number base converter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanFactorial calculator
Calculate n! exactly with BigInt and inspect the full integer, digit count, and scientific-notation preview.
LookupToolChakanFibonacci sequence generator
Generate a Fibonacci sequence, preview values, and inspect the last number and digit count.
LookupToolChakanPrime factorization calculator
Factor an integer into prime factors and exponent notation for quick number theory checks.
LookupToolChakanFraction calculator
Calculate fraction addition, subtraction, multiplication, and division with simplified fraction and decimal output.
LookupToolChakanPercentage calculator
Answer common percentage questions such as A percent of B, A as a percent of B, and percent change.
LookupToolChakanAverage and median calculator
Summarize a number list with count, sum, mean, median, minimum, maximum, and range.
LookupToolChakanVariance and standard deviation calculator
Calculate population and sample variance and standard deviation from a number list.
LookupToolChakanGCD and LCM calculator
Calculate the greatest common divisor and least common multiple for multiple integers.
LookupToolChakanPower and root calculator
Calculate powers, square roots, cube roots, and nth roots with formula output.
LookupToolChakanLogarithm calculator
Calculate logarithms with a custom base and compare natural log and common log values.
LookupToolChakanMatrix calculator
Calculate matrix addition, subtraction, multiplication, transpose, and determinant from typed matrix rows.
LookupToolChakan24 game solver
Search four numbers for arithmetic expressions that make 24 and return copyable solutions.
LookupToolChakanArea calculator
Calculate area formulas for rectangles, triangles, circles, trapezoids, parallelograms, and ellipses.
LookupToolChakanPerimeter calculator
Calculate perimeter formulas for rectangles, triangles, circles, regular polygons, and ellipses.
LookupToolChakanVolume calculator
Calculate volume formulas for boxes, cubes, cylinders, cones, spheres, and pyramids.
LookupToolChakanSurface area calculator
Calculate surface area formulas for boxes, cubes, cylinders, cones, and spheres.
LookupToolChakanTrigonometry calculator
Convert degrees and radians and calculate sin, cos, tan, cot, sec, and csc values.
LookupToolChakanQuadratic equation solver
Solve ax² + bx + c = 0 and inspect the discriminant, real or complex roots, vertex, and formula steps.
LookupToolChakanLinear equation solver
Solve ax + b = 0 and inspect the solution, rearrangement steps, and no-solution or identity cases.
LookupToolChakanRatio and proportion calculator
Solve A:B = C:X with cross multiplication for scaling, recipes, ratios, and proportional estimates.
LookupToolChakanTwo-point geometry calculator
Calculate distance, slope, midpoint, direction angle, and line equation from two Cartesian points.
LookupToolChakanLatitude longitude distance calculator
Calculate approximate great-circle distance and initial bearing between two latitude/longitude points.
LookupToolChakanDecimal degrees and DMS converter
Convert latitude and longitude between decimal degrees and DMS text with N/S/E/W directions.
LookupToolChakanCartesian and polar converter
Convert between x/y Cartesian coordinates and r/theta polar coordinates with degrees and radians.
LookupToolChakanCoordinate axis order swapper
Swap coordinate axis order in batches for lat/lon, lon/lat, and x/y table cleanup.
LookupToolChakanGeohash encoder and decoder
Encode latitude/longitude to Geohash or decode a Geohash into its center point and bounding box.
LookupToolChakanNMEA-0183 sentence parser
Parse common NMEA-0183 GNSS sentences, checksum status, coordinates, fix quality, speed, and satellite fields.
LookupToolChakanNMEA checksum calculator
Calculate and verify the XOR checksum for NMEA-0183 sentences and generate a standard sentence.
LookupToolChakanNTRIP Source-Table parser
Parse NTRIP Source-Table STR, CAS, and NET lines for mountpoints, RTCM format, coordinates, authentication, and fee fields.
LookupToolChakanNTRIP STR line generator
Generate a copyable NTRIP Source-Table STR line from mountpoint, RTCM, coordinate, authentication, and fee parameters.
LookupToolChakanLine chart builder
Generate a local SVG line chart from label/value rows for trend inspection and shareable reports.
LookupToolChakanBar chart builder
Generate a local SVG bar chart from category/value rows for ranking, comparison, and statistics.
LookupToolChakanPie and donut chart builder
Generate a local SVG pie or donut chart and inspect category share, total, and legend values.
LookupToolChakanScatter chart builder
Generate a local SVG scatter chart from x/y rows and inspect distribution, outliers, and correlation.
LookupToolChakanRadar chart builder
Generate a local SVG radar chart from dimension scores for product, capability, or option evaluation.
LookupToolChakanFunnel chart builder
Generate a local SVG funnel chart and inspect step-by-step and overall conversion rates.
LookupToolChakanGauge chart builder
Generate a local SVG gauge chart from value, min, max, and target for progress or threshold checks.
LookupToolChakanWord cloud generator
Generate a local SVG word cloud from pasted text and inspect high-frequency words for reports and keyword summaries.
LookupToolChakanMermaid diagram preview
Render Mermaid flowcharts, sequence diagrams, and state diagrams locally as SVG previews with strict security settings.
LookupToolChakanSVG preview viewer
Paste SVG code, clean risky script or external-resource content, and inspect dimensions, element count, and preview.
LookupToolChakanSVG to image converter
Convert cleaned SVG code locally into PNG, JPEG, or WebP output with width, height, and quality controls.
LookupToolChakanSVG minifier and cleaner
Clean and minify SVG code locally by removing scripts, event handlers, external resources, comments, and extra whitespace.
LookupToolChakanSVG Data URI encoder
Generate cleaned SVG Data URI snippets for CSS background images or HTML img tags.
LookupToolChakanImage to Base64 and Data URI converter
Convert a local image into raw Base64, a data URL, and ready-to-paste HTML img or CSS background-image snippets without uploading the file.
LookupToolChakanAspect ratio and image size calculator
Calculate simplified image ratios, proportional resize dimensions, contain/cover fit sizes, and scale percentages.
LookupToolChakanPixel print size and DPI calculator
Convert image pixels and DPI into printable inch or centimeter sizes, required pixels, and clarity hints.
LookupToolChakanScreen PPI calculator
Calculate screen PPI, pixel pitch, physical width and height, and display-density level from resolution and diagonal size.
LookupToolChakanPX REM 字号间距转换查看
输入像素值和根字号，批量查看 px、rem、em 和常见 CSS 间距/字号换算结果，适合前端还原设计稿和响应式排版检查。
px remCSS前端CSS clamp 响应式字体计算查看
输入最小/最大字体、最小/最大视口和根字号，生成 CSS clamp() 字体公式，并查看中间视口下的字号变化。
CSS clamp响应式字体前端VW VH 视口单位换算查看
输入设计稿尺寸、元素像素和目标视口，查看 vw、vh、vmin、vmax 和实际像素回算，适合响应式宽高和移动端首屏检查。
vw vh视口单位响应式布局Image color palette extractor
Extract average colors, dominant palettes, color shares, and reusable CSS variables from a local image.
LookupToolChakanImage coordinate and pixel color picker
Pick an image pixel coordinate locally, inspect HEX/RGBA color values, relative position, and a marked preview.
LookupToolChakanFavicon maker
Generate common favicon PNG sizes, HTML snippets, and a web manifest package locally from one image.
LookupToolChakanPlaceholder image generator
Generate local placeholder images for mockups, covers, ad slots, and layout testing with custom size and colors.
LookupToolChakanText to image generator
Generate local PNG, JPEG, or WebP text cards for social covers, announcements, quotes, and simple posters.
LookupToolChakanBarcode generator
Generate local SVG EAN-13, UPC-A, or Code 39 barcodes with checksum status, reusable SVG code, and shareable previews.
LookupToolChakanImage metadata remover
Re-export a local image as PNG, JPEG, or WebP to usually remove EXIF, camera, GPS, and source metadata.
LookupToolChakanRounded image generator
Create rounded-corner images locally with radius, padding, background color, format, and quality controls.
LookupToolChakanGradient background image generator
Generate local gradient background images for covers, ads, mockups, and design placeholders.
LookupToolChakanImage information viewer
Inspect image file size, type, pixel dimensions, aspect ratio, transparency, and basic color information locally with adjustable preview background.
LookupToolChakanImage resizer
Resize an image locally to a target width and height and export PNG, JPEG, or WebP output.
LookupToolChakanImage format converter
Convert images locally between PNG, JPEG, and WebP with quality controls and output preview.
LookupToolChakanImage compressor
Compress an image locally with max-width and quality settings and inspect the size reduction.
LookupToolChakanImage cropper
Crop an image locally by x, y, width, and height pixel coordinates.
LookupToolChakanImage rotate and flip tool
Rotate or flip an image locally and export the transformed PNG, JPEG, or WebP file.
LookupToolChakanImage watermark tool
Add a local text watermark to an image with position and opacity controls.
LookupToolChakanBatch image compressor
Compress multiple local images by max width, format, and quality, then package the outputs as a downloadable ZIP archive.
LookupToolChakanBatch image watermark tool
Add text watermarks to multiple local images and package the processed outputs as a downloadable ZIP archive.
LookupToolChakanZIP archive viewer
Inspect a local ZIP archive for file count, folder count, extension distribution, estimated original size, and entry list.
LookupToolChakanZIP file creator
Select multiple local files and create a downloadable ZIP archive in the browser without uploading anything.
LookupToolChakanZIP text preview
Preview common text files inside a local ZIP archive, including TXT, JSON, CSV, Markdown, XML, HTML, CSS, and JavaScript snippets.
LookupToolChakanZIP file extractor
Extract one matched file from a local ZIP archive in the browser and download it without uploading the archive.
LookupToolChakanFile chunk splitter
Split a local file into fixed-size chunks and download all parts plus a manifest as a ZIP archive.
LookupToolChakanFile chunk merger
Merge selected local chunk files into one downloadable file by filename order or selected order.
LookupToolChakanPDF metadata viewer
Inspect a local PDF for page count, file size, document metadata, creation and modification dates, and page-size previews.
LookupToolChakanPDF page splitter
Extract selected pages from a local PDF by page range and download a new PDF without uploading the file.
LookupToolChakanPDF file merger
Merge multiple local PDF files in browser order and download a combined PDF without uploading the source files.
LookupToolChakanImages to PDF converter
Convert selected local images into a downloadable PDF with page size, margin, fit mode, and image quality controls.
LookupToolChakanPDF page numberer
Add page numbers to a local PDF with position, format, font size, margin, and color controls, then download a new PDF.
LookupToolChakanPDF text watermark adder
Add a local text watermark to every page of a PDF with opacity, position, font size, and color controls.
LookupToolChakanPDF metadata editor
Update local PDF document metadata such as title, author, subject, keywords, creator, and producer, then download a new PDF.
LookupToolChakanPDF page remover
Remove selected pages from a local PDF by page range and download a new PDF without modifying the source file.
LookupToolChakanPDF page reorderer
Reorder or duplicate local PDF pages by page order expression and download a new PDF without uploading the source file.
LookupToolChakanPDF page rotator
Rotate selected local PDF pages clockwise by 90, 180, or 270 degrees and download a new PDF without uploading the source file.
LookupToolChakanBatch file rename planner
Select multiple local files and generate a safe rename plan with numbering, case, extension, and CSV export options.
LookupToolChakanFilename cleaner
Clean pasted filename lists by removing unsafe characters, normalizing spacing, deduplicating names, and exporting a CSV mapping.
LookupToolChakanFile signature viewer
Inspect a local file header signature, browser MIME type, extension, and likely real file type without uploading the file.
LookupToolChakanFile extension lookup
Look up common file extensions, MIME types, format purpose, text/binary nature, related extensions, and handling tips.
LookupToolChakanFile encoding viewer and converter
Inspect and convert local text file encodings such as UTF-8, UTF-16, GB18030, Big5, Shift_JIS, EUC-KR, and Windows-1252.
LookupToolChakanSubtitle format converter
Convert SRT subtitles to WebVTT, WebVTT to SRT, or normalize SRT locally with time offsets and downloadable output.
LookupToolChakanText file splitter
Split pasted text into chunks by line count or character count, then review chunk stats and export chunk mappings.
LookupToolChakanFile path parser
Parse Windows, POSIX, and URL paths into directory, filename, extension, depth, query parts, and normalized output.
LookupToolChakanFile size converter
Convert file sizes across SI and IEC units and compare decimal vs binary display values.
LookupToolChakanUnit converter
Use this unit converter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakan年龄计算与生日查看
输入生日，查看精确年龄、出生星期、下次生日日期和距离生日还有多少天。
年龄生日日期Japanese era date converter
Convert Gregorian dates and Japanese era dates across Reiwa, Heisei, Showa, Taisho, and Meiji with resume-friendly date text.
LookupToolChakanChinese relative title calculator
Look up common Mandarin Chinese kinship titles from a relationship chain such as father’s older sister.
LookupToolChakanLeap year checker
Check whether a Gregorian year is a leap year and inspect its February and full-year day counts.
LookupToolChakanDay of year calculator
Find the day number, remaining days, quarter, weekday, and leap-year context for a date.
LookupToolChakanWorkday calculator
Count workdays, weekends, natural days, and manually excluded holidays between two dates.
LookupToolChakanCountdown day calculator
Calculate how many days remain until an event date, or how many days have passed.
LookupToolChakanStopwatch and timer
Create a local stopwatch or countdown timer template with a real-time browser timer panel and shareable duration link.
LookupToolChakanWorld time converter
Convert a base date and time across common IANA time zones for meetings, travel, and international coordination.
LookupToolChakanChild height estimator
Estimate a child's genetic target adult height range from parent heights, with a clear non-medical disclaimer.
LookupToolChakanEnglish date formatter
Format a date in common US, UK, long, short, ordinal, weekday, and ISO English date styles.
LookupToolChakanMortgage payment calculator
Estimate monthly payments, total interest, and repayment summaries from loan amount, annual rate, term, and repayment type.
LookupToolChakanHousing provident fund mortgage calculator
Estimate monthly payments, total interest, and repayment totals for a housing provident fund mortgage from amount, rate, term, and repayment type.
LookupToolChakanCombined mortgage calculator
Estimate a combined commercial and provident-fund mortgage with split principal, split interest, total monthly payment, and total repayment.
LookupToolChakanEarly mortgage repayment calculator
Compare early mortgage repayment strategies: lower monthly payment versus shorter remaining term, including estimated interest saved.
LookupToolChakanVAT and GST calculator
Calculate tax-exclusive price, tax amount, and tax-inclusive total from a manually entered VAT/GST rate.
LookupToolChakanDiscount calculator
Calculate final price, savings, total price, and discount rate from original price, discount type, and quantity.
LookupToolChakanProfit margin calculator
Estimate gross profit, margin rate, markup rate, total revenue, and break-even unit price from cost, price, fees, and quantity.
LookupToolChakanBreak-even point calculator
Calculate break-even units, target-profit units, contribution margin, and revenue thresholds from fixed cost, unit price, and variable cost.
LookupToolChakanROI calculator
Calculate net profit, ROI, annualized ROI, and payback multiple from investment, final value, income, costs, and holding period.
LookupToolChakanTarget price and margin calculator
Reverse-calculate target selling price, unit profit, margin, and markup from cost, fees, and target margin or markup rate.
LookupToolChakanSimple interest calculator
Calculate simple interest, net interest, maturity amount, and daily yield from principal, annual rate, duration, and interest tax.
LookupToolChakanCAGR calculator
Calculate total growth, CAGR, growth multiple, and average annual increase from beginning value, ending value, and years.
LookupToolChakanUnit price comparison calculator
Compare two prices by unit cost, cheaper option, unit savings, and equivalent purchase savings.
LookupToolChakanCompound interest calculator
Estimate future balance, total contributions, and compounded gains from principal, annual rate, duration, and monthly contributions.
LookupToolChakanSavings goal calculator
Estimate the monthly savings required to reach a target amount from current savings, annual return, and timeline.
LookupToolChakanRetirement planning calculator
Estimate retirement nest egg target, savings gap, and required monthly contribution from spending, return, inflation, and withdrawal assumptions.
LookupToolChakanStock profit calculator
Calculate stock, ETF, or fund profit and loss from buy price, sell price, quantity, and transaction fees.
LookupToolChakanDividend yield calculator
Calculate dividend yield, annual dividend income, withholding tax, and monthly cash-flow equivalent from manually entered share and dividend assumptions.
LookupToolChakanTip calculator
Calculate tip amount, tax, total payment, per-person amount, and per-person tip from bill amount, tip rate, tax rate, and party size.
LookupToolChakanBill split calculator
Split a bill across people after discounts and service fees, with optional whole-unit rounding and adjustment amount.
LookupToolChakanCommission calculator
Calculate commission, total income, effective commission rate, and threshold gap from sales, rate, base salary, threshold, and bonus.
LookupToolChakanInflation purchasing power calculator
Estimate future equivalent cost, cumulative inflation, present purchasing power, and purchasing power loss from amount, inflation rate, and years.
LookupToolChakanAsset depreciation calculator
Calculate straight-line asset depreciation, accumulated depreciation, book value, and remaining depreciation from cost, salvage value, useful life, and elapsed years.
LookupToolChakanPayback period calculator
Calculate simple and discounted payback period from initial investment, periodic net cash flow, period unit, and discount rate.
LookupToolChakanLoan cost and APR calculator
Estimate monthly payments, fees, total borrowing cost, and an approximate APR for consumer, auto, or business loans.
LookupToolChakanLoan amortization schedule calculator
Build a monthly loan amortization preview with principal, interest, extra payments, remaining balance, payoff time, and interest saved.
LookupToolChakanDebt-to-income ratio calculator
Estimate front-end and back-end debt-to-income ratios from monthly income, housing payment, existing debt, and a planned new payment.
LookupToolChakanSalary to hourly wage calculator
Convert annual salary and bonus into monthly, weekly, daily, hourly, and overtime-rate estimates from work hours and paid weeks.
LookupToolChakanKorean weekly holiday pay calculator
Estimate Korean weekly holiday pay from hourly wage, weekly hours, scheduled work days, and attendance status.
LookupToolChakanKorean severance pay calculator
Estimate Korean severance pay from service dates, monthly salary, annual bonus, and unused annual leave allowance.
LookupToolChakanCredit card payoff calculator
Estimate how long it takes to clear a credit card balance from balance, APR, and fixed monthly payment.
LookupToolChakanUS federal income tax estimator 2026
Estimate 2026 US federal individual income tax using IRS standard deduction and progressive tax brackets.
LookupToolChakan中国个人所得税综合所得估算查看
按中国个人所得税综合所得年度汇算口径，输入全年收入、专项扣除、专项附加扣除和已预缴税额，估算应纳税额、应补或应退金额。
中国个税所得税税率Date calculator
Use this date calculator tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanRMB uppercase converter
Use this rmb uppercase converter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanChina ID checker
Use this china id checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanBMI calculator
Use this bmi calculator tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanBMR calculator
Estimate basal metabolic rate from sex, age, height, and weight using a common formula.
LookupToolChakanBody fat estimator
Estimate body fat percentage from circumference measurements using the US Navy method.
LookupToolChakanHealthy weight range calculator
Convert a height into a BMI-based healthy weight range and an approximate BMI 22 reference.
LookupToolChakanFuel consumption calculator
Calculate L/100km, km/L, fuel cost, and cost per kilometer from distance, fuel, and price.
LookupToolChakanShelf life date calculator
Calculate an expiry date and remaining days from production date and shelf-life days.
LookupToolChakanGPA calculator
Estimate weighted GPA from course credits and numeric or letter grades.
LookupToolChakanTDEE calorie estimator
Estimate BMR and TDEE from sex, age, height, weight, and activity level, then preview maintenance, fat-loss, and muscle-gain calorie targets.
LookupToolChakanSleep cycle calculator
Plan bedtimes or wake-up times from a target clock time, fall-asleep delay, and sleep-cycle length.
LookupToolChakanDaily water intake calculator
Estimate daily water intake from body weight, activity minutes, and climate adjustment with cup and reminder ranges.
LookupToolChakanPassword strength checker
Use this password strength checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanRandom password generator
Generate a secure random password or a memorable passphrase with configurable length, numbers, and symbols in your browser.
LookupToolChakanCron expression viewer
Use this cron expression viewer tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanCron human-readable explainer
Use this cron human-readable explainer tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanUnicode codec
Use this unicode codec tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanUnicode character inspector
Inspect each Unicode character with code point, UTF-8 bytes, UTF-16 units, character category, and hidden-character hints.
LookupToolChakanString escape and unescape converter
Escape or unescape strings for JSON, JavaScript, HTML, regex, SQL, and CSV contexts locally in the browser.
LookupToolChakanPunycode and UTF-8 viewer
Use this punycode and utf-8 viewer tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanQR code generator
Use this qr code generator tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanLunar calendar
Use this lunar calendar tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanLunar to solar date converter
Convert a Chinese lunar calendar date, including leap months, into its Gregorian date with zodiac, heavenly stems, earthly branches, and solar term context.
LookupToolChakan24 solar terms lookup
View the 24 Chinese solar terms for a year and inspect the previous, current, and next solar term around a selected date.
LookupToolChakanDate range summary
Summarize a date range with inclusive days, days between, weekdays, weekends, full weeks, month coverage, and weekday distribution.
LookupToolChakanWeek number calculator
Look up ISO week number, week-year, weekday index, week start and end dates for a Gregorian date.
LookupToolChakanMonth calendar viewer
Generate a month calendar with week rows, weekdays, weekends, ISO week labels, and date details.
LookupToolChakanTime duration converter
Convert days, hours, minutes, seconds, and milliseconds into total units and a normalized human-readable duration.
LookupToolChakanQuarter calculator
Find the calendar quarter for a date, quarter start and end dates, progress, remaining days, and next quarter.
LookupToolChakanBusiness hour calculator
Calculate working minutes and hours between two date-times using a weekday schedule and daily work window.
LookupToolChakanDate format converter
Convert a local date and time into ISO, UTC, Chinese, slash, compact, Unix timestamp, and RFC 3339 formats.
LookupToolChakanChinese almanac
View Chinese almanac information with a structured layout for lunar date, suitable activities, and cautions.
LookupToolChakanMenstrual cycle estimator
Use this menstrual cycle estimator tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanPregnancy due date estimator
Use this pregnancy due date estimator tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanZhougong dream lookup
Use this zhougong dream lookup tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanFeng shui study lookup
Use this feng shui study lookup tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanLong-tail lookup topics
Searchable tool workflows for high-intent long-tail keywords, AI citations, and shareable lookup pages.
Stock profit, dividend yield, savings-goal, compound interest, and inflation planning
A safe formula-based topic for stock profit, dividend yield, savings-goal backsolving, monthly compounding, retirement gaps, inflation-adjusted purchasing power, ROI, CAGR, and target-price planning.
China AI search answer-source and citation readiness checklist
A public-page readiness checklist for China AI search and answer systems: source visibility, title alignment, structured data, FAQ, internal links, keyword coverage, robots, sitemap, llms.txt, and log evidence without citation guarantees.
China search engine sitemap submission and crawl-readiness checklist
A practical checklist for China search readiness: verify robots, sitemap, ownership files, canonical rules, direct-answer content, log evidence, and the difference between automated and manual webmaster submissions.
Search Verification File Header and Cache Checklist
A release checklist for Baidu verification files, BingSiteAuth.xml, and IndexNow key files: status, content type, cache headers, validators, security headers, CSP, and China/global origin parity.
Browse by scenario
Tools are grouped around real lookup jobs instead of a long flat list.
Network and domain lookup
Inspect IP, DNS, WHOIS, HTTP headers, SSL certificates, and connectivity.
IP, domains and DNSSubnets, addresses and routingWeb protocols and certificatesSEO and GEO lookup
Inspect metadata, robots, sitemaps, structured data, and AI search visibility.
Page crawling and indexingLaunch rules and trackingContent and keyword qualityText and developer tools
Format JSON, convert encodings, inspect timestamps, hashes, and developer text.
JSON and schemaMarkup, config and SQLURL and web codecsPrompts and keyword tools
Explore AI prompts, keyword ideas, long-tail terms, and dictionary-style tools.
AI prompts and keywordsDemand terms and search intentFinance and tax tools
Estimate loans, taxes, returns, market data, and precious metal decision checks.
Mortgages and loansTaxes, discounts and marginsInterest, savings and planningEveryday lookup tools
Common life, date, calendar, body, and public information utilities.
Date basicsDate ranges and calendarsTime, countdown and work hoursMath calculators
Inspect factorials, Fibonacci, prime factors, fractions, percentages, statistics, and common math formulas.
Number patterns and theoryFractions, ratios and statisticsAlgebra, equations and matricesChart builders
Generate local SVG previews for line, bar, pie, scatter, radar, funnel, and gauge charts.
Common chartsDiagrams and flowsImage tools
Inspect, resize, convert, compress, crop, rotate, and watermark images locally in the browser.
SVG and vector imagesImage dimensions and densityImage colors and site assetsFile tools
Inspect, package, preview, and organize common files locally in the browser without uploads.
ZIP archivesFile chunks and mergeLocal PDF tools