Learn How File Formats Work

Explore the byte structure of real files to understand formats.

Nije potrebna prijavaDatoteke ostaju privatne

Povucite datoteke ovdje ili kliknite za pregled

Any file bez ograničenja veličine datoteke

Pregledaj datoteke

Vaše datoteke nikada ne napuštaju vaš uređaj. Sva obrada odvija se lokalno u vašem pregledniku.

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.

Odaberite datoteku

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

Obradite

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

Preuzmite

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

✓Potpuno besplatno — bez skrivenih troškova, nikada

✓Nije potreban račun, e-mail ili prijava

✓Datoteke nikada ne napuštaju vaš uređaj

✓Apsolutno bez ograničenja veličine datoteke

✓Bez vodenih žigova na bilo kojem izlazu

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