Free File Hash Checker

Downloaded software? Don't install it blind. The File Hash Checker computes a file's MD5 and SHA-256 hashes entirely on your device — using chunked reading so even multi-gigabyte files work smoothly — then compares them against the checksum the publisher provided. A match means the file arrived exactly as released; a mismatch means stop and re-download.

Drop a file here or click to browse

Hashed in chunks, right in your browser — large files are fine.

Private by design. This tool runs 100% in your browser — your files are hashed locally and never uploaded or stored anywhere.

How to Use the File Hash Checker

  1. Drop a file into the zone or click to browse.
  2. Its MD5 and SHA-256 hashes are computed locally with a progress bar.
  3. Optionally paste the expected checksum to instantly verify a match.
  4. A green MATCH means the file is intact; red means it may be corrupted or tampered with.

Features

Drag-and-drop file input; chunked hashing for large files; live progress bar; MD5 + SHA-256 computed together; expected-checksum comparison with match indicator; copy buttons.

Benefits & Use Cases

Verify OS installers, software releases and datasets before trusting them; audit files you received for tampering; confirm backups copied without corruption.

Tips

Get the expected checksum from the publisher's official site over HTTPS — never from the same page as a suspicious download link. A matching MD5 proves integrity, but SHA-256 is the stronger guarantee.

Frequently Asked Questions

How do I verify a download?

Find the publisher's published checksum (usually labeled SHA-256 or MD5), drop the downloaded file into this tool, paste the expected value, and look for the green MATCH indicator.

What if the hashes don't match?

Delete the file and download again from the official source. Do not run it — a mismatch means corruption at best and tampering at worst.

Can it handle very large files?

Yes. Files are read and hashed in 2 MB chunks, so multi-gigabyte ISOs and archives process smoothly without loading everything into memory.

Is my file uploaded?

Never. All hashing happens in your browser via the File API. You can even disconnect from the internet after the page loads and it still works.

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