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Vérificateur de signature de fichier

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.

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File Signature Checker

Glissez-déposez votre fichier ici.

Les résultats apparaîtront ici

Choose a file to see the result.

Étape suivante suggérée

These tools are the most likely next step after the page you are on now.

Ouvrir l’outil

Vérificateur de type MIME

Continue with a focused tool for the next part of the job.

Check metadata

Voir les métadonnées

Open the full metadata view and inspect the file in more detail.

Ce que vérifie cet outil

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.

Comment l’utiliser

  1. 1Upload the file
  2. 2Review the header bytes and matched signature
  3. 3Use the result together with the MIME type and extension

Ce que montrent les résultats

  • 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

File signature

A file signature is a recognizable byte pattern near the start of a file.

MIME type

A MIME type is a label that describes the kind of content in a file, such as image/jpeg or application/pdf.

Questions fréquentes

Is a signature check enough to trust a file?

No. It is a useful signal, but not a complete safety or authenticity check.

Quels formats de fichier cet outil accepte-t-il ?

Vérificateur de signature de fichier fonctionne avec : 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.

À quoi sert cet outil ?

À utiliser pour : Check a suspicious extension, Confirm that a file header matches expectations et Pair low-level signature data with MIME inspection.

Articles associés

Qu’est-ce qu’une signature de fichier ?

Learn what a file signature is, how it differs from an extension, and why it helps confirm the real format of a file.

Qu’est-ce qu’un type MIME ?

Learn what a MIME type is, where it appears, and why it matters when a file is uploaded, downloaded, or previewed online.

Vérificateur de signature de fichier | FileMetaHub