Welcome on hash online, a md5 database by KikooDX powered by "the communauty".

To add a string to the database and find his hash, put [http://kikoodx.pythonanywhere.com/hash/StringToAdd] in the URL bar.
To try finding a hash in the database put [http://kikoodx.pythonanywhere.com/find/HashToFind] in the URL bar.

You can also use
[http://kikoodx.pythonanywhere.com/shash/StringToAdd]
[http://kikoodx.pythonanywhere.com/sfind/HashToFind]
for a shell utility.