File Type Detector

Inspect a file in the browser and identify common formats from extension, MIME type and magic bytes.

Free to useBrowser-firstBilingual helpReady on page

Tool area

Use it directly on this page

FileMIMEMagic Bytes

Tool area

The tool will be ready here as soon as the page finishes loading.

How to use

1 Choose a local file to inspect.

2 Review the extension, MIME type, size and magic bytes.

3 Use the signature guess as a quick format hint.

Common uses

Check unknown exported files quickly

Compare browser MIME with magic-byte signatures

Verify whether a file matches its extension

Recommended flow

FAQ

What is File Type Detector useful for?

Check unknown exported files quickly

How do I start using File Type Detector?

Choose a local file to inspect. Review the extension, MIME type, size and magic bytes. Use the signature guess as a quick format hint.

What should I do after this result?

Most people continue with Hex Editor, Image EXIF / GPS Viewer, Protobuf Encoder / Decoder next.