File Signature Inspector
Check the token bytes at the beginning of the file, identify several common formats and display hex previews.
Files and results are only processed in this browser, and the server is not uploaded. Files are not preserved after leaving or emptying the page; the original file will not be modified.
File Signature Inspector User manual
- Fill in the parameters or select the file according to the form, and check the unit and format first.
- Checks whether the file with the extension is modified has a PDF file header.
- Click the processing button to view the results, you can copy or download and save.
Calculation method and processing rules
Read only the first 512 bytes and identify candidate signatures such as PNG, JPEG, PDF and ZIP.
scope of use
Signatures are only candidates and do not verify file integrity, authenticity, or security; identifying zip does not represent a confirmed Office format.
Will the input content be saved on the server?
This tool handles input in the browser, and does not upload files or form content. Typing practice scores are only saved in the native browser.
Why may the result be different from other tools?
Signatures are only candidates and do not verify file integrity, authenticity, or security; identifying zip does not represent a confirmed Office format. Please compare the input unit, rounding method, applicable rules and data version first.