At the Free Music Archive, you can browse a massive collection of royalty free music tracks, either to play online or download to your device/computer.
Genres here include Pop, Country, Rock, Classical, Electronic, Instrumental, Hip-Hop, and more.
You can play tracks directly in your browser or download them to play later. There’s also the option to search by artist, charts, and labels.
Note: the ‘free’ version of Free Music Archive is intended for personal use only (play online, download, or share with friends).
A ‘Pro’ version of the service is available and allows you to use music in commercial projects, such as on YouTube videos, podcasts, and social media.
Their website also has regular blog posts and a podcast series that is well worth checking out.