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JSON5 formatter and validator

Use this json5 formatter and validator tool to inspect, convert, or generate a clear result directly in your browser.

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The result will appear here as structured cards.

Example results you can open

Short, high-intent examples that are easy to open, share, and understand for search engines and AI systems.

Release config

Clean a commented release config

Review how comments, single quotes, and trailing commas are normalized into strict JSON before deployment.

Open example
Build config

Review build aliases and output settings

Check build target, sourcemap, and alias mappings in a frontend-style JSON5 config.

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Test config

Review test retries and coverage flags

Inspect retries, timeout, reporters, and coverage before copying CI or test config into strict JSON.

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Parse error

Debug a missing comma in JSON5

The sample intentionally omits a field separator so you can inspect the JSON5 parse error location.

Open example
Basic config

Inspect a basic JSON5 config snippet

Preserves the existing indexable example for single quotes, trailing array commas, and config note fields.

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API config

Review API retry settings

Check retry, timeout, and enabled fields before migrating a server-side config.

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Server config

Review server ports and feature flags

Inspect host, ports, cache, and debug fields in a Node-style service config.

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Theme config

Review theme layout and feature flags

Check theme, layout, flags, and trailing commas before converting frontend settings to strict JSON.

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FAQ

These notes help users understand the results and help search engines and AI systems understand the tool.

What does JSON5 formatter and validator do?

It helps you inspect or process this value and get a readable result quickly.

Is my input saved?

Local tools run in the browser when possible. Server-side checks only use the input needed to complete the lookup.

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