Runs locally in your browser. Nothing you enter is uploaded to our servers.
Tips for file hashing
Hashing verifies the file bytes you selected, not the download URL.
Same algorithm must be used when comparing to a published digest.
Large files are hashed locally — keep the tab open until done.
A hash match does not prove the publisher is trustworthy.
Record algorithm + digest together in your notes.
Hash a file to compare copies
Processing stays in your browser — your input is not uploaded to our servers.
File hash is the sibling of checksum: drop a file, get a digest, compare two downloads or an attachment against a known value.
The bytes never go to our servers. A matching hash means identical content, not a trusted publisher.
Hash a file
Select the file
The one on disk you want to compare, not a screenshot of the file name.
Compute the digest
Use the same algorithm as the other copy (often SHA-256).
Diff the hex
Any difference means the files are not the same.
File hash FAQ
Checksum vs file hash on this site?
Same idea: local digest of bytes. Use whichever page matches the algorithm you were given.
Does a hash antivirus-scan the file?
No. It only fingerprints. Malware with the same bytes would hash the same.
Upload?
No. Hashing is in the browser.