Is my text sent to a server?

No. The hash is computed locally using your browser's built-in Web Crypto API (crypto.subtle.digest). Your text never leaves your device and nothing is uploaded.

When should I use SHA-512 over SHA-256?

SHA-512 produces a longer 512-bit digest and can be faster than SHA-256 on 64-bit hardware. Both are secure members of the SHA-2 family — choose SHA-512 when a longer digest or 64-bit performance is preferred.

How long is a SHA-512 hash?

A SHA-512 hash is 512 bits, shown as 128 hexadecimal characters.

Is SHA-512 more secure than SHA-256?

Both are secure SHA-2 hashes with no known practical weaknesses. SHA-512 has a longer digest, which gives more collision headroom, but for most purposes either is fine. Choose by digest length and performance needs rather than security alone.

Can a SHA-512 hash be reversed?

No. It is one-way, so there is no way to compute the input from the digest. The only approach is to guess inputs and re-hash, which is infeasible for anything other than short or common strings.

Is SHA-512 safe for password hashing?

Not on its own. A single raw SHA-512 is too fast for passwords. Use a purpose-built, slow password hash such as bcrypt, scrypt or Argon2, which add salting and a tunable cost factor.

What is the SHA-512 Hash Generator?

Free SHA-512 hash generator that turns any text into a 128-character hexadecimal digest using the browser's built-in Web Crypto API. Runs entirely in your browser — nothing is uploaded to any server. It runs free in your browser on Gera Tools, with nothing uploaded.

SHA-512 Hash Generator

Name: SHA-512 Hash Generator
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

Get one useful tool a week

Like this tool? Enter your email and we'll send you one genuinely useful Gera tool a week — plus a link to come back to this one. No spam, one-click unsubscribe any time.

SHA-512 hash generator

Paste any text and instantly get its SHA-512 digest — a 512-bit value shown as 128 hexadecimal characters. The hash updates as you type, useful for checksums, integrity verification, and any system that expects a SHA-512 digest.

How it works

The tool encodes your text as UTF-8 bytes and passes them to the browser’s built-in Web Crypto API (crypto.subtle.digest("SHA-512", …)). SHA-512 is a one-way member of the SHA-2 family: the same input always yields the same 512-bit output, the digest reveals nothing about the input, and changing a single character produces an entirely different result. The hashing happens in the browser, so your text never leaves your device.

SHA-512 in the SHA-2 family

SHA-2 is a family of cryptographic hash functions published by NIST, including SHA-224, SHA-256, SHA-384, and SHA-512. All share the same underlying Merkle–Damgård construction but differ in digest length and internal word size:

Variant	Digest length	Internal word	Rounds
SHA-256	256 bits / 64 hex chars	32-bit	64
SHA-384	384 bits / 96 hex chars	64-bit	80
SHA-512	512 bits / 128 hex chars	64-bit	80

SHA-512 uses 64-bit operations internally, which is why it can be faster than SHA-256 on 64-bit processors despite having a longer output — modern CPUs handle 64-bit arithmetic in a single instruction. On 32-bit hardware or constrained environments the advantage reverses.

Verification examples

These digests are deterministic — the same input always produces the same output:

Input	SHA-512 (first 32 of 128 hex characters)
(empty string)	cf83e1357eefb8bdf1542850d66d8007…
`abc`	ddaf35a193617abacc417349ae204131…

A single changed character — even a trailing space — produces a completely different 128-character digest. This avalanche effect is a deliberate property of the algorithm.

When to use SHA-512

File integrity checking. Hash a file before and after transfer or storage; a matching digest confirms the file is unmodified.
API signature verification. HMAC-SHA512 is widely used to sign webhook payloads and JWT tokens.
Password storage in legacy systems. Iterated SHA-512 (many thousands of rounds) is used in some Unix crypt implementations, though purpose-built password hashing functions like bcrypt or Argon2 are preferred for new systems.
Digital certificates and TLS. SHA-512 appears in certificate signature algorithms alongside RSA and ECDSA.

What SHA-512 is not suitable for

A single raw SHA-512 is too fast for direct password hashing. At modern hardware speeds, billions of SHA-512 hashes per second are achievable, making brute-force attacks on common passwords practical. Use bcrypt, scrypt, or Argon2 for passwords — they are designed to be deliberately slow and include salting automatically.

Nothing you type here is uploaded to any server.