SHA-512 Hash Generator

Generate a SHA-512 hash of any text online instantly — free SHA512 hash generator.

About

About the SHA-512 Hash Generator

SHA-512 produces a 512-bit digest, shown as 128 hex characters — the longest output in the SHA-2 family. Despite being the biggest, it's often the fastest of the four on 64-bit CPUs, since it operates on 64-bit words natively rather than the 32-bit words SHA-256 uses.

A plain SHA-512 hash isn't the same as the "$6$" password hashes in Linux's /etc/shadow: those use SHA-512-crypt, which adds a random salt and runs thousands of rounds. Plain SHA-512 is fast by design — great for checksums, but a poor choice for storing passwords, where bcrypt, scrypt or Argon2 belong.

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Guide

Using the SHA-512 Hash Generator

  1. 1

    Step 1

    Type or paste your text into the box.

  2. 2

    Step 2

    Click Generate hashes to compute it entirely in your browser, using the Web Crypto API.

  3. 3

    Step 3

    SHA-512 is one of the four results in the table — SHA-1, SHA-256, SHA-384 and SHA-512 are all computed at once.

  4. 4

    Step 4

    Copy the SHA-512 value from the table.

  • Generates a 128-character SHA-512 hash in lowercase hex — the longest of the four
  • Often the fastest SHA-2 variant on 64-bit processors
  • Matches sha512sum and standard crypto libraries for the same UTF-8 text
  • Shows SHA-1, SHA-256, SHA-384 and SHA-512 together, so you can compare all four
  • Uses your browser's built-in Web Crypto API — the text never leaves your device
  • Free, with no sign-up and no limit on how many hashes you generate

Developers

Developers create integrity checksums for stored or transmitted data.

System administrators

Admins compare a value with sha512sum output from another machine.

Security students

Students see first-hand why a fast hash isn't a password hash.

Data engineers

Engineers fingerprint records so changed rows are easy to detect.

Generate another hash

SHA-1 Generator SHA-256 Generator SHA-384 Generator

Examples

SHA-512 Hash Generator examples

3 worked examples

01

A standard test string

Type "abc" to get ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f, the well-known SHA-512 test vector.

02

Hashing an empty input

With the box empty, SHA-512 produces cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e — 128 hex characters.

03

Checking a file's integrity

Paste a downloaded file's expected SHA-512 checksum next to the value this tool computes for the same content; if the two 128-character strings match exactly, the file wasn't altered.

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FAQ

Frequently asked questions

Quick answers to common questions about the SHA-512 Hash Generator.

How do I generate a SHA-512 hash?

Type or paste your text above and click Generate hashes. The SHA-512 value appears in the results table — hashing happens directly in your browser, using the Web Crypto API.

Is SHA-512 free to use?

Yes. It's free, with no sign-up and no limit on how much text you hash.

Why is SHA-512 sometimes faster than SHA-256?

SHA-512 works on 64-bit words internally, which lines up naturally with modern 64-bit CPUs, while SHA-256 works on 32-bit words — so on a 64-bit machine, SHA-512 can outrun SHA-256 despite producing a longer output.

Is SHA-512 more secure than SHA-256?

Both are considered secure with no known practical attacks; SHA-512's larger output gives it a higher theoretical brute-force resistance, but for most everyday use SHA-256's 256-bit security margin is already far beyond what's practically breakable.

Is my text safe when I hash it here?

Yes. Everything runs directly in your browser using the Web Crypto API — nothing is uploaded anywhere.

How long is a SHA-512 hash?

512 bits, shown as 128 hexadecimal characters.

Can I use SHA-512 to store passwords?

Not on its own. A plain hash is fast to compute, which also makes it fast to guess. Store passwords with a dedicated password-hashing function such as bcrypt, scrypt or Argon2, which add a salt and are deliberately slow.

Why is my SHA-512 different from another site's?

The input isn't byte-for-byte identical — a trailing space, a Windows line ending or a different character encoding all change the result. This tool hashes your text exactly as typed, as UTF-8.

What is SHA-512/256?

A variant that runs SHA-512 with different starting values and keeps only the first 256 bits. It isn't offered here; this tool produces standard SHA-512.

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