Security & Encoding

Hash Generator

Generate SHA-256, SHA-384, and SHA-512 digests of text or files using the browser's Web Crypto API. Nothing is uploaded — file hashing reads data locally.

● LOCAL ● NO NETWORK ● FIPS 180-4
ⓘ The file is read locally in your browser. It is never uploaded to any server.
⚠ Do not use these hashes for passwords. SHA-256/384/512 are fast by design and trivially brute-forced on GPU hardware. Use bcrypt, Argon2, or scrypt for password hashing.

Related tools

Base64 Encoder / Decoder JWT Decoder UUID Generator
Encoding & Identifiers: Need to encode binary hash digests as ASCII strings? Use Base64 & Base64URL. Generating distributed unique IDs instead of hashes? Use the UUID Generator.

About Cryptographic Hashes & FIPS 180-4

What it does

Computes SHA-256, SHA-384, and SHA-512 cryptographic digests of text or file contents using the browser's built-in crypto.subtle.digest() API (Web Crypto). SHA-1 is available as a legacy option. File hashing reads the file entirely in the browser — no upload occurs.

Algorithm reference

  • SHA-256 — 256-bit output, general-purpose. Most widely used.
  • SHA-384 — 384-bit output, used in TLS certificates and JWT ES384.
  • SHA-512 — 512-bit output, highest security margin in the SHA-2 family.
  • SHA-1 — Legacy, 160-bit. Collision-vulnerable; do not use for new systems.
No data leaves your browser. Text and files are processed entirely locally. Nothing is transmitted or stored.