Catalytic WizAlert — free, private online tools

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes and HMACs for text or files, and verify checksums.

Fingerprint text and files

A hash is a fixed-length fingerprint of data: the same input always gives the same hash, and changing a single byte changes it completely. Use it to check downloads, compare files or create checksums.

How to use

  1. Choose Text and type, or choose File and drop any file.
  2. MD5, SHA-1, SHA-256, SHA-384 and SHA-512 are calculated at once.
  3. Switch the output between lowercase hex, uppercase HEX and Base64.
  4. Paste a published checksum into “Compare” to confirm a download is intact.

HMAC

Turn on HMAC and enter a secret key to create keyed hashes, for example to check webhook signatures. Browsers don't offer HMAC-MD5.

Which one should I use?

  • SHA-256 is the modern default for checksums and security.
  • MD5 and SHA-1 are broken for security but still common for legacy checksums.