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File Checksum Verifier

Check a downloaded file against its published MD5, SHA-1 or SHA-256 checksum, and hash many files at once with a CSV export.

🔒 Runs in your browser — files never leave your deviceFree · No sign-up
Drop files here or click to choose One file to verify, or a whole batch to hash at once. Nothing is uploaded.

The algorithm is detected from the length of what you paste. Case and spaces do not matter, and a trailing file name (as in sha256sum output) is ignored.

How to verify a download

  1. Drop the file you downloaded onto the box above.
  2. Paste the checksum the publisher lists on their download page into Expected checksum — the algorithm is recognised automatically from its length.
  3. Press Compute hashes. A green Match badge means the file arrived intact; a mismatch means you should download it again from the official source.

FAQ

What does a mismatch actually mean?

Usually an interrupted or partial download, or the wrong version of the file. Occasionally it means the file was tampered with in transit, which is exactly what checksums are published to catch — do not run it.

Which algorithm should I trust?

SHA-256 for anything security-related. MD5 and SHA-1 are still fine for spotting a corrupted download, but both are broken against a deliberate attacker, so never rely on them alone to prove a file is genuine.

Can I check many files at once?

Yes. Drop a whole batch and every file gets its own row with the algorithms you ticked; Export CSV saves the table for a build log or a release checklist.

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