Identify a File's Real Type

Check a file's magic number to see what it actually is.

Keine Anmeldung erforderlichDateien bleiben privat

Dateien hier ablegen oder klicken zum Durchsuchen

Any file keine dateigrößenbeschränkung

Dateien durchsuchen

Deine Dateien verlassen nie dein Gerät. Die Verarbeitung findet lokal in deinem Browser statt.

Inspect the raw bytes of any file — offset, hex, and ASCII columns, like a classic hex editor. The file is read locally and never uploaded.

file identification tips

🔎

The first bytes (magic number) reveal the true format regardless of the file extension.

🏷️

The tool names common types automatically — PNG, PDF, ZIP, MP4, and more.

🕵️

Useful when a file has the wrong or no extension, or you suspect it's mislabeled.

🔒

Read locally — safe for unknown files.

Datei wählen

Drop your file into the tool above. It stays entirely on your device — nothing is sent to any server.

Verarbeiten

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Herunterladen

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

✓Komplett kostenlos — keine versteckten Kosten, jemals

✓Kein Konto, keine E-Mail, keine Anmeldung erforderlich

✓Dateien verlassen nie dein Gerät

✓Keinerlei Dateigrößenbeschränkungen

✓Keine Wasserzeichen auf Ausgaben

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Inspect headers and bytes while debugging a file f

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Spot readable text embedded in a binary file.

Inspect a Suspicious File Safely

Examine an unknown file's bytes without opening or

Learn How File Formats Work

Explore the byte structure of real files to unders