File Hash Checker help

Confirm a download arrived intact by comparing its checksum to the value the site published. The file is read in the page and never uploaded.

Steps

1. Pick "A file" and drop the download in, or pick "Text" and paste a string.
2. Choose the algorithm the source used. SHA-256 is the common one.
3. Read the digest. "Copy" puts it on the clipboard.
4. Paste the published value into "Expected value". You can paste a bare hash or a whole sha256sum line; the tool finds the hash in it.
5. The line below turns green on a match, red on a mismatch.

Notes

• If the expected value length does not fit the chosen algorithm, the tool says so and tells you which to pick.
• A large file takes a moment; it is hashed in one pass in memory.
• SHA-1 is here for old checksums and legacy systems. Do not rely on it for security.
• MD5 is not offered. Modern download pages publish SHA-256.

Hashing runs in your browser with the built-in Web Crypto API. Nothing you drop or paste is uploaded.