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About Checksum Calculator

Upload a file and calculate its checksum using MD5, SHA-1, or SHA-256. Compare it against an expected value to verify the file has not been corrupted or altered during download or transfer.

Getting Started

  1. 1Upload the file you want to verify.
  2. 2Select the checksum algorithm.
  3. 3Paste the expected checksum to compare (optional).
  4. 4The tool highlights whether the values match.

What You Get

  • MD5, SHA-1, and SHA-256 support
  • Drag-and-drop file upload
  • Side-by-side comparison with an expected checksum
  • Match/mismatch indicator
  • Processes files locally — nothing is uploaded to a server

Perfect For

  • Verifying software downloads

    Confirm that a downloaded ISO, installer, or archive matches the hash published by the developer.

  • Data transfer validation

    Ensure a file sent via email or cloud storage arrived intact by comparing checksums on both ends.

Frequently Asked Questions

Which algorithm should I use?

Use whichever algorithm the file publisher provides. SHA-256 is the most common choice for modern software verification.

How is this different from the hash generator?

The checksum calculator is focused on file verification with a comparison feature. The hash generator is broader, supporting text input and multiple simultaneous algorithms.

Privacy First

All processing happens directly in your browser. Your files never leave your device and are never uploaded to any server.