What File Type Is This?

Identify any file instantly and learn what it’s used for. Runs in your browser — files are not uploaded.

No uploads

Header (magic bytes) detection

Clear “what it’s for” explanation

How it works

We read a tiny portion of your file (usually the first 4–4096 bytes) and match it against known signatures. Then we explain what that file type is used for and what usually creates it.

Privacy

Your file stays on your device. This page does not upload, store, or send your file anywhere. Detection runs locally in your browser.

File identification tool

Drop a file here We’ll detect the type + explain what it’s for.

Or paste an extension

Then

Tip: include the dot. We’ll still work if you forget it.

Status: Ready

Detected file type

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Confidence

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Typical extension(s)

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What this file is used for

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Usually created by

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How we detected it

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