Discogs is a Database and marketplace for physical music releases — vinyl, CDs, cassettes, and other formats. It catalogs millions of releases with details about pressing, label, catalog number, and condition. You can use it to identify a record you own, check its value, or buy and sell copies. The marketplace connects collectors and sellers, and the database is maintained by a community of contributors who care deeply about accuracy.

For vinyl collectors, it's essentially indispensable. You can scan a barcode, find the exact pressing, and see what people are asking for it. The site also has a collection management feature that lets you catalog your own records. It's not for everyone, but if you're into physical music, it's the best resource on the internet.