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What is File Extension Lookup?

File Extension Lookup is a free online tool that allows you to lookup file extensions and their descriptions. Find what file type an extension belongs to.

Features

  • Lookup file extensions by name
  • Search by extension, description, or category
  • Copy extensions to clipboard
  • Common file types included
  • 100% client-side

Frequently Asked Questions

Is this tool free to use?

Yes, File Extension Lookup is completely free. No registration required.

Is my data secure?

All processing happens in your browser. Your data never leaves your device.

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