LOCAL DIAGNOSTIC STATION / FREE
Identify a File by Its Signature
Discover the actual file format by reading its magic bytes, not just its extension.
READY FOR LOCAL ANALYSISNO UPLOAD · NO ACCOUNT
No file selected
Your diagnostic report will appear here. We explain uncertain results instead of promising guaranteed repair.
RELATED HELP
Repair guidance
SAFE TROUBLESHOOTING
How to Fix a ZIP File That Will Not Open
ZIP archive problems often come from incomplete transfers, damaged central directory records or unsupported encryption.
Read steps ↗SAFE TROUBLESHOOTINGPDF Not Opening? Diagnose and Recover Safely
A PDF can fail to open because of an incomplete download, extension mismatch or damaged cross-reference information.
Read steps ↗SAFE TROUBLESHOOTINGHow to Check and Fix a Corrupted PNG Image
PNG images use structured chunks with CRC checks. A broken chunk can make the picture unreadable.
Read steps ↗