Hash Generator (SHA-1 / SHA-256 / SHA-512)

What does the Hash Generator tool do?

A hash function turns data of any length into a fixed-length fingerprint: the same input always gives the same output, and you can't go back from the output to the input. This tool calculates SHA-1, SHA-256 and SHA-512 with the browser's Web Crypto API.

What is it for?

• Comparing the checksum of a downloaded file or release
• Seeing intermediate values while testing hash/signature logic for payment notifications
• Quickly checking whether a piece of text has changed

Things to keep in mind

• Plain SHA-256 is not enough for storing passwords; use slow, salted algorithms such as bcrypt or Argon2.
• SHA-1 is no longer considered collision-resistant; prefer SHA-256 in new systems.