Learn How File Formats Work

Explore the byte structure of real files to understand formats.

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Gooi lêers hier neer, of klik om te blaai

Any file geen lêergrootte-beperking

Blaai deur lêers

Jou lêers verlaat nooit jou toestel nie. Alle verwerking gebeur plaaslik in jou blaaier.

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.

learning tips

🎓

Compare the headers of a PNG, a PDF, and a ZIP to see how formats announce themselves.

🔢

Seeing real bytes alongside ASCII makes format specs much easier to follow.

🧩

A hands-on way to understand magic numbers and headers.

🔒

Experiment freely — nothing is uploaded.

Kies lêer

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

Verwerk

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

Laai af

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

✓Heeltemal gratis — geen verborge koste ooit nie

✓Geen rekening, e-pos of aanmelding benodig nie

✓Lêers verlaat nooit jou toestel nie

✓Geen lêergrootte-beperkings van enige aard nie

✓Geen watermerke op enige uitvoer nie

Identify a File's Real Type

Check a file's magic number to see what it actuall

Debug a Binary File

Inspect headers and bytes while debugging a file f

Find Text Strings in a File

Spot readable text embedded in a binary file.

Inspect a Suspicious File Safely

Examine an unknown file's bytes without opening or