sha-256 hmac

online hash-based message authentication code generator

This is an online HMAC (Hash-based Message Authentication Code) calculator that uses SHA-256 as the hash function.

Text or paste the plaintext you want to generate an HMAC for. Click the calculate button to generate a Hash-based Message Authentication Code value. You can then copy and paste it elsewhere.

Hashes are mathmatical functions that generate a fixed length string for a given input. Strong hashes make it almost impossible to find 2 inputs that create the same hash value. Change the input, change the hash. Learn more about hashes...

test vectors
For the input The quick brown fox jumps over the lazy dog key=key the SHA-256 value is: f7bc83f430538424b13298e6aa6fb143ef4d59a14946175997479dbc2d1a3cd8
For the input: The 728 Club key poker the SHA-256 hash is 21ab6a4a70d701d2ea49df05bf9d6ec88191bef43686294bdc9c75eb2f7e72fa

The hash code used is from Google Code.