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.

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.

Hashing runs entirely in your browser using the standard Web Crypto API, so it is safe to use with sensitive strings — nothing is uploaded to any server.

SHA-512 is a secure member of the SHA-2 family with a longer digest than SHA-256, and is often faster on 64-bit machines. As with any general-purpose hash, store passwords with bcrypt or Argon2 rather than a raw SHA-512.