Developer utility

SHA-256 & SHA-512 Hash Generator

Calculate lowercase hexadecimal hashes for text or a local file using Web Crypto.

Local processing

Text and files stay on this device. The page makes no hashing or upload request.

or choose a local file

Files up to 100 MiB are read into browser memory. Nothing is uploaded.

SHA-256
SHA-512

How to use it

  1. Enter text or select one local file.
  2. The browser calculates both supported digests.
  3. Compare every character, including leading zeroes.

What a hash proves

Matching hashes strongly indicate matching bytes. A hash does not encrypt data, scan for malware, or prove who created a file.