About this hash generator
A hash is a short fingerprint that represents a piece of data. Feed in any text and a hashing algorithm produces a fixed-length string of letters and numbers. Two things make hashes useful: the same input always gives the same output, and you cannot reverse the output back into the original. That is why hashes are used to verify that a downloaded file has not been tampered with, to compare data without revealing it, and as a building block when storing passwords safely. This tool shows four common members of the SHA (Secure Hash Algorithm) family at once. SHA-256 and SHA-512 are recommended for modern security; SHA-1 is included for older systems but is no longer considered secure. Everything is computed in your browser with the built-in Web Crypto feature, so your text stays private.
Frequently asked questions
- What is a hash?
- A short, fixed-length fingerprint of data. The same text always gives the same hash, and it cannot be reversed.
- SHA-256 vs SHA-1?
- SHA-256 is modern and secure; SHA-1 is older and no longer safe for security, but still appears in legacy systems.
- Is my text uploaded?
- No — hashing happens in your browser via Web Crypto. Nothing leaves your device.