MD5 is one-way encryption. No matter what kind of data is encrypted with MD5, you will get a fixed-length string.

MD5 universal user file integrity check, also used for password encryption.

If you want to crack MD5, because its own algorithm is irreversible, you can only use the exhaustive method, that is, continuous spell string encryption, and compare it with the known MD5 string, which is a considerable project and requires a huge database.