FREE ONLINE TOOL · FILE UTILITIES
File Signature Inspector
Inspect file signatures and claimed extensions. intro
WORKSPACESTEP 1 · CHOOSE YOUR INPUT → STEP 2 · CONFIGURE → STEP 3 · EXPORT
Interactive toolReview processing details below
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How to use File Signature Inspector
- Choose the local files or settings needed for the operation.
- Review the options and start processing in the browser.
- Copy the result or download the output; keep the original files.
Example use
Choose a file and inspect its leading bytes and detected signature.
Why use this tool?
Use this free browser utility when you need a focused result without installing desktop software or creating an account. The workspace is designed for a single task, with the input, controls and output kept together.
Privacy, compatibility and limitations
A matching magic number does not guarantee a file is safe.
Before you download: Check the output visually or technically before replacing an original file. Browser support, device memory and source-file structure can affect results.
Questions about File Signature Inspector
What does File Signature Inspector do?
Inspect file signatures and claimed extensions. A matching magic number does not guarantee a file is safe.
Do I need to install software?
No. The tool runs inside a compatible browser. Hardware access may require your permission, and PDF libraries may need to load from a CDN.
