Do you have an electrum wallet but lost the encrypted wallet password (and you don't have the seed anymore)? Download kali linux, extract the hash using electrum2john script and try to crack it with john or hashcat.

If you recall parts of the original password, you can use sets like "OneRuleToRuleThemAll.rule" and let hashcat generate a password list that can be used to crack the wallet.

Note: This approach won't help if you are looking for a way to recover the passphrase that was used to extend your seed (custom word in electrum)!