Download (open source) → right-click .zpaq → Extract → Done. Final Recommendation Avoid online ZPAQ extractors entirely. They are either non-functional, insecure, or crippled. Use PeaZip (portable version possible) or the official zpaq command line – both are free and offline-safe.
If you must extract a ZPAQ on a locked-down machine (e.g., school PC), you can use on a USB drive. No online tool worth the risk. zpaq file extractor online
"Radio Creds" are votes awarded to artists by radio programmers who have downloaded their music and have been impressed with the artist's professionalism and the audience's response to the new music. Creds help artists advance through the AirPlay Direct community.
Only radio accounts may add a Radio Cred. One week after the track has been downloaded the radio account member will receive an email requesting a Cred for each artist they've downloaded.