Decrypting passphrase

I’ve this file which is encrypted using PGP and it’s a passphrase. I need to access this file badly but I forgot what the passphrase is. Is there any way I can decrypt the file (e.g. is there any service to decrypt passphrase, or software). Pls help or if possible, pls suggest any websites where I can download a shareware/freeware to help me encrypt the file.