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File Extension Checker

Compare a filename extension with the file signature detected from its bytes.

◉ 100% Free⚡ Fast Workflow🔒 Privacy Focused

🔎 Run Tool

📁 Clear file workflow
⚡ Fast processing
⬇ Download or copy results

📖 How to use

  • Choose the required file or paste the requested content.
  • Set the available option when shown.
  • Run the tool and review the result.
  • Copy or download the result when available.

⚡ Features

  • Free Tool Digital Hub workflow.
  • No account required.
  • Focused validation and clear error messages.
  • Responsive desktop and mobile interface.

💡 Privacy

  • Local utilities process files in your browser.
  • Remote URL tools use the TDH server only for the requested fetch.
  • Private and local-network URLs are blocked by the remote fetcher.
  • Keep the original file until you verify the result.