About SHA-512 Hash
SHA-512 Hash computes the largest common digest in the SHA-2 family — 512 bits, rendered as 128 hexadecimal characters. Unlike SHA-256 it is built around 64-bit words, which is why on a modern 64-bit processor it can actually run faster than its shorter sibling despite doing more rounds.
Its size and structure suit a few specific jobs: deriving keys and subkeys where the extra length is useful, matching values published by systems that standardised on SHA-512, and hashing very large inputs on current hardware. The digest's length also makes brute-force search astronomically harder, though as with any plain hash that says nothing about whether short inputs can simply be guessed.
With no external reason to pick it, SHA-256 remains the pragmatic default; SHA-512 is the right call when something in your pipeline already speaks it.
How to use SHA-512 Hash
- 1 Type or paste the input whose SHA-512 digest you need.
- 2 The 128-character hex digest is computed as you type using the native crypto engine.
- 3 Compare the result character for character against the reference value to confirm a match.
Frequently asked questions
Is SHA-512 always slower than SHA-256?
No, and it is often faster on 64-bit hardware. SHA-512 operates on 64-bit words that fit a modern CPU's registers, whereas SHA-256 uses 32-bit words, so the extra rounds do not automatically make it slower in practice.
How many hex characters should I expect?
128. That is 512 bits split into bytes and printed as two hex digits each, and it is fixed regardless of input length.
Is SHA-512 the same as SHA-512/256?
No. SHA-512/256 is a distinct truncated variant with its own initial state and a 256-bit output. This tool implements full SHA-512 and returns the entire 512-bit digest.
Does SHA-512 hide the content?
No. It is a one-way function rather than encryption, and it is unkeyed — anyone can compute the same digest. It is for integrity checks, not for keeping data secret.
Free, online, and private
Free to use
SHA-512 Hash is completely free. There is no account to create, no login, and no hidden charge or usage limit.
Runs online in your browser
It is a free online tool that runs entirely in your browser. Nothing to download or install — open the page and start using it right away.
Your data stays private
All processing happens locally on your device. Your input is never uploaded, stored, or tracked, so it never leaves your browser.
How SHA-512 Hash behaves in detail
These are the specifics of this implementation — the exact ranges, defaults and fixed settings you are working with.
| Parameter | Value |
|---|---|
| Algorithm | SHA-512 through the WebCrypto digest — the widest digest offered on the site |
| Digest width | 128 lowercase hex characters (512 bits) |
| Input handling | the field is UTF-8 encoded, so one emoji can contribute several bytes |
| Empty input | still returns a digest — cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e |
| Update mode | live — no button, the digest follows the keystrokes |
Compiled from the implementation of this tool and checked against it by itoolnet.
What SHA-512 Hash does not do
Knowing the edges of a tool saves more time than another list of its features. These are the cases where it will not do what you might expect.
- The full 128-character digest is always shown. There is no truncation to SHA-512/256 or SHA-512/224, no uppercase or base64 alternative, and no field for pasting an expected value to compare against.
- A wider digest is not a slower-to-attack password hash. There is no salt and no iteration count in this pipeline, so the output is unsuitable for storing passwords however long it is — the PBKDF2 tool is the one that stretches a password.
- Text only, with no file mode. The SHA-512 of a file has to be taken over its raw bytes; typing or pasting the file's text changes every byte above ASCII into its UTF-8 encoding, so the digest differs from the one a download page publishes.
Tested and documented by itoolnet, the team that builds and maintains this site.