Hash Generator — MD5, SHA

About this calculator

This tool runs a piece of text or data through a cryptographic hash function such as MD5 or one of the SHA family, producing a fixed-length string of characters called a hash or digest. The same input always produces the same hash, but the process only works one way: you cannot reverse a hash back into the original text, and even a tiny change to the input produces a completely different result.

Developers use it to verify that a downloaded file hasn't been corrupted or tampered with by comparing hashes, to generate checksums for data integrity checks, and to create consistent identifiers or lookup keys from arbitrary text during testing and debugging. It also comes up when learning how password storage or digital signatures work conceptually.