What does File signature viewer do?
It helps you inspect or process this value and get a readable result quickly.
File signature viewer
Inspect a local file header signature, browser MIME type, extension, and likely real file type without uploading the file.
Waiting
The result will appear here as structured cards.
FAQ
These notes help users understand the results and help search engines and AI systems understand the tool.
Is my input saved?
Local tools run in the browser when possible. Server-side checks only use the input needed to complete the lookup.