Identify a File's Real Type

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

Ingen pålogging krevesFiler forblir private

Slipp filer her, eller klikk for å bla

Any file ingen filstørrelsesgrense

Bla gjennom filer

Filene dine forlater aldri enheten. All behandling skjer lokalt i nettleseren din.

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.

Velg Fil

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

Prosess

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

Last ned

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

✓Helt gratis – aldri noen skjulte kostnader

✓Ingen konto, e-post eller pålogging kreves

✓Filer forlater aldri enheten din

✓Ingen filstørrelsesbegrensninger overhodet

✓Ingen vannmerker på noen utgang

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

Learn How File Formats Work

Explore the byte structure of real files to unders