Method 1: The Quickest Browser-to-Files Approach (No Computer)
If you want to download a track while on the go, you can use a web-based converter and the iOS app. While this won't put the song inside the Apple Music app automatically, it is the first step for all mobile methods. download youtube mp3 to iphone music library
: Open the YouTube app, tap Share , and select Copy Link . : Connect your iPhone via USB
: Connect your iPhone via USB. In the sidebar, select your device, click Music , and check Sync Music . Click Apply to move the tracks to your iPhone's Music app. On Mac (macOS Catalina or later): How To Download Music From YouTube On iPhone - Full Guide On Mac (macOS Catalina or later): How To
: Send the MP3 from your iPhone to your PC (via iCloud, email, or USB).
: Open the Apple Music app for Windows or iTunes. Go to File > Add File to Library and select your MP3.
: Paste the link, select MP3 (preferably 320kbps for best quality), and tap Convert .