md5 decoding. How they do it?

Question

i thought, that it is impossible to decode md5 hashes, but i found tools, which decode them here. but i have no idea, how they do it in such a short period of time(it takes

Answer 1

It is impossible to decode an MD5 hash as it is a one way algorithm, they will have a database of pre-calculated hashes and the string that was used to generate the hash and then perform a lookup.