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SHA-512 Hash Generator

Generate SHA-512 hashes of text or files — the longest SHA-2 digest — in hex or Base64, and check them against an expected value, all in your browser.

How to use this tool

Steps for using the Hash Generator.

  1. Type or paste text, or choose File to hash a file of up to 50 MB. SHA-512 is listed first; the other algorithms are shown below it for comparison.
  2. The digest updates as you type. Pick hex, HEX (uppercase) or Base64 to match the format you need.
  3. Click Copy next to SHA-512, or Copy all / Download for every digest.
  4. To check a download, paste its published checksum into Verify a checksum — the matching algorithm lights up green.

Example

SHA-512 of the classic test sentence

Text (UTF-8) — the Sample button
The quick brown fox jumps over the lazy dog
SHA-512 (hex)
07e547d9586f6a73f73fbac0435ed76951218fb7d0c8d788a309d785436bbb642e93a252a954f23912547d1e8a3b5ed6e1bfd7097821233fa0538f3db854fee6

Common use cases

  • Verifying files against SHA-512 checksums published by Linux distributions and vendors.
  • Long, collision-resistant content identifiers.
  • Checking intermediate values when implementing signature or key-derivation schemes.
  • Comparing two copies of a large file.

SHA-512: the longest SHA-2 digest

SHA-512 produces a 512-bit digest — 128 hexadecimal characters. It works on 64-bit words, so on 64-bit processors it is often as fast as or faster than SHA-256 for large inputs.

No practical attack against SHA-512 is known. It is used for file checksums, in Ed25519 signatures, in some Linux password-hash formats (as the building block of a slow, salted scheme — not on its own) and wherever a long digest is wanted.

Every SHA-512 digest is 128 hex characters regardless of input size; in Base64 it is 88 characters. Changing one character of input changes the whole digest, as the second example shows.

This page computes SHA-512 with the browser's Web Crypto API; files up to 50 MB are hashed locally and never uploaded.

Limitations

  • A plain SHA-512 is not a password hash — use bcrypt, scrypt or Argon2.
  • Files up to 50 MB; use sha512sum for larger files.
  • For keyed signatures use HMAC-SHA512.

Frequently asked questions

Is SHA-512 more secure than SHA-256?

It has a longer digest and a larger security margin, but both are considered secure. Use SHA-512 when your system asks for it or you want the extra length.

How long is a SHA-512 hash?

512 bits — 128 hexadecimal characters, or 88 characters in Base64 (with ==).

Can I use SHA-512 to store passwords?

Not on its own — it is far too fast, so attackers can test billions of guesses. Use a dedicated password hash (bcrypt, scrypt or Argon2) with a unique salt.

How do I check a SHA-512 checksum on the command line?

sha512sum file on Linux, shasum -a 512 file on macOS or Get-FileHash -Algorithm SHA512 file in PowerShell.