About this tool
Produce a cryptographic hash (digest) of any text using the browser's built-in Web Crypto API. Supports SHA-1, SHA-256, SHA-384 and SHA-512. Hashing is one-way and runs entirely on your device.
Frequently asked questions
Which algorithm should I use?
SHA-256 is a good default. Avoid SHA-1 for security-sensitive uses as it is considered weak against collisions.
Can I reverse a hash?
No. Cryptographic hashes are one-way functions; you cannot recover the original text from the digest.