1. 01Enter text or choose a file
2. 02Select the digest algorithm
3. 03Enter a key when using HMAC
4. 04Calculate and copy the digest

If a publisher provides SHA-256, calculate the digest for your local file and compare the complete value.

• A matching hash does not prove the source itself is trustworthy
• MD5 and SHA-1 should not be chosen for new collision-resistant security designs

• Verify a downloaded file against a published SHA-256
• Generate a text digest
• Compare file hashes
• Debug HMAC input and keys

File contents stay in the browser by default.