Enter your text below to get a SHA-1 hash. Hashes are "one-way" conversions. In simplistic terms, you can convert text to a hash, but you cannot get the text back from the hash. The original information is not contained in the hash. For this reason, hashing is an important part of most password storage implementations.
Update 2018: This tool has been converted to use a pure JavaScript implementation, Caligatio/jsSHA.