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Comprobador de firma de archivo
Upload a file to inspect its header bytes and match them against common file signatures.
Inspect the first bytes of a file and match them against common file signatures.
File Signature Checker
Arrastra y suelta tu archivo aquí.
Los resultados aparecerán aquí
Choose a file to see the result.
Siguiente paso sugerido
These tools are the most likely next step after the page you are on now.
Qué revisa esta herramienta
Use this page when you want a low-level format check beyond the file name and MIME type.
- It reads the first bytes of the file, shows them as hex, and compares them with a built-in signature list.
- This is useful when the extension looks wrong or you want a second format check.
For many common files, the file stays on your device while the tool runs. No account is required.
Cómo usarla
- 1Upload the file
- 2Review the header bytes and matched signature
- 3Use the result together with the MIME type and extension
Qué muestran los resultados
- A matched signature increases confidence that the file really belongs to that format family.
- An unknown signature does not automatically mean the file is unsafe. It may simply be a format outside the current detector list.
Key terms
Preguntas frecuentes
Is a signature check enough to trust a file?
No. It is a useful signal, but not a complete safety or authenticity check.
¿Qué formatos de archivo acepta esta herramienta?
Comprobador de firma de archivo funciona con: Common images, PDFs, ZIP packages, Office containers, MP3, WAV, FLAC, OGG, MP4/MOV, WebM/Matroska, AVIF, HEIC/HEIF, BMP, ICO, TIFF, and SVG/XML headers.
¿Para qué sirve esta herramienta?
Úsala para: Check a suspicious extension, Confirm that a file header matches expectations y Pair low-level signature data with MIME inspection.