Runs entirely in your browser: your input, the HMAC key and the expected hash never leave this device.
SHA-512: a wider SHA-2 digest
SHA-512 is the 64-bit sibling of SHA-256 and produces a 512-bit digest β 128 hexadecimal characters. The SHA-512 of abc is ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f. The longer output gives it a larger security margin, and it runs faster than SHA-256 on 64-bit CPUs because it works with 64-bit words internally.
Choose SHA-512 when you want the strongest widely deployed SHA-2 digest, when a standard or platform already asks for it (many Linux distributions ship SHA-512 password hashes via crypt), or on 64-bit servers where its speed is a bonus. On constrained, 32-bit or embedded devices, SHA-256 is usually the lighter choice. Neither is a password-hashing function by itself.
How to compute a SHA-512 hash
- Enter the text β the 128-character digest updates as you type.
- Verify the length and timing under the result.
- Optionally paste an expected SHA-512 to compare.
- Copy the digest for your manifest or audit log.
Frequently asked questions about SHA-512
How long is a SHA-512 hash?
128 hexadecimal characters, i.e. 512 bits β double the length of SHA-256 output.
Is SHA-512 better than SHA-256?
Both are unbroken. SHA-512 has a bigger digest and is faster on 64-bit CPUs; SHA-256 is shorter to store and faster on 32-bit hardware.
Does a longer hash mean slower hashing?
Not here β SHA-512 processes data in the same pass but with 64-bit words, so on modern 64-bit chips it is often the faster of the two.
Runs entirely in your browser: your input, the HMAC key and the expected hash never leave this device.
