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.

SHA-512 Hash Generator

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.

Example

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

SHA-512 is a secure SHA-2 hash with a longer digest than SHA-256 and is often faster on 64-bit hardware. As with any general-purpose hash, store passwords with a dedicated function like bcrypt or Argon2 rather than a raw SHA-512. Nothing is uploaded to any server.