Learn How File Formats Work

Explore the byte structure of real files to understand formats.

Sisselogimist ei nõutaFailid jäävad privaatseks

Lohista failid siia või klõpsa sirvimiseks

Any file faili suuruse piirangut pole

Sirvi faile

Sinu failid ei lahku kunagi sinu seadmest. Kogu töötlus toimub kohalikult sinu brauseris.

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.

Vali fail

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

Töötle

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

Laadi alla

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

✓Täiesti tasuta — varjatud kulusid pole kunagi

✓Kontot, e-posti ega sisselogimist ei nõuta

✓Failid ei lahku kunagi sinu seadmest

✓Faili suuruse piiranguid pole üldse

✓Ühegi väljundi peal pole vesimärke

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