SHA-512 Generator

SHA-512 of any text or file. 128 hex characters per hash. Slightly higher security margin than SHA-256, and on 64-bit hardware, typically faster.

When SHA-512 beats SHA-256

• 64-bit servers hashing large files — SHA-512 saturates 64-bit memory pipelines better, often 1.5–2× faster.
• Higher security margin — twice the output bits means the collision-finding work doubles in exponent. Both are safe today; SHA-512 has more headroom.
• Long-term archival — for hashes you want to remain meaningful in 30+ years, SHA-512 has more buffer against unknown future attacks.

When SHA-256 wins

• Human-readable contexts — Git commits, filenames, URLs. 64 hex chars is already long; 128 is unwieldy.
• 32-bit or constrained hardware — SHA-256 is faster.
• Compatibility with existing protocols — most JWT, TLS, and codesigning tooling defaults to SHA-256.

SHA-512/256 — the best of both?

There's a variant called SHA-512/256: run SHA-512 internally, then truncate the output to 256 bits. You get SHA-512's 64-bit performance with SHA-256's output size. It's used in some newer systems but isn't widely supported in standard libraries — Web Crypto doesn't expose it directly. This page implements plain SHA-512.

For developers

Native API:

const bytes = new TextEncoder().encode("hello tooljo");
const buf   = await crypto.subtle.digest("SHA-512", bytes);
const hex   = Array.from(new Uint8Array(buf))
  .map(b => b.toString(16).padStart(2, "0")).join("");

Other algorithms

See all algorithms at once, focused SHA-256, or legacy MD5 tools. For "which one should I use," read our guide on hash function selection.