File Type Checker

Check magic bytes for common images, archives, documents, audio, video containers, and executables locally.

Choose file

—Detected family

—MIME

—Filename extension

—Detection basis

Choose a fileMagic-byte checks cover common formats only. A signature identifies a container/family, not whether the full file is valid or safe.

How to use this File Type Checker

Inspect common file signatures instead of trusting only the filename extension. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.