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Checksum Verifier

Hash a file and compare it with a published checksum to confirm the download is intact.

Verify a file checksum

Computed: —
Verdict: —
Matched entry: —
Every byte is hashed locally with the Web Crypto API; the file is never uploaded.

How to use the Checksum Verifier

  1. Choose the downloaded file you want to verify.
  2. Pick the algorithm used by the published checksum.
  3. Paste the checksum and read the verdict line.

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Frequently Asked Questions

Common questions about the free online checksum verifier.

Choose the file, pick the algorithm the publisher used, paste the published checksum and read the verdict. A match means the bytes are identical.
It proves the file is exactly the one the publisher hashed. It does not prove the publisher is trustworthy, only that nothing changed in transit.
Yes. Every line is scanned for a hex value, so you can paste the entire SHA256SUMS file and the tool reports which entry matched.
Use the one the publisher provides. SHA-256 is the common default, SHA-1 and MD5 appear on older downloads, and CRC32 only catches corruption.
Either the file changed during download or the wrong algorithm was selected. Check the algorithm first, then download the file again.
No. Upper and lower case are treated as the same value, and spaces, tabs and prefixes such as sha256: are ignored.
No. The file is read with FileReader and hashed in the page with the Web Crypto API, so it never leaves your device.
Yes. It is completely free, works offline once loaded, and needs no account, no sign-up and no installation.

Last updated: October 10, 2026