iPhone & iPad
Turn a YouTube video into an MP3 on your iPhone and keep it in the Files app for offline listening.
No computer needed.
How it works
In YouTube or YouTube Music, tap Share → Copy link.
Open savetomp4.net, paste the link, choose a bitrate and tap Convert.
Tap Download and confirm. The MP3 appears in Files → Downloads; tap it to play.
What you get
Background play on YouTube needs Premium. An MP3 in Files plays with the screen locked.
Start the MP3 in Files and lock the phone; playback continues like any audio.
It's ordinary audio, so lock-screen and headphone controls work.
Make a Music or Podcasts folder in Files and drag downloads in.
Pick a higher bitrate for music or 128 kbps to save space on spoken audio.
Share the file to VLC, Documents or any player that accepts MP3.
Save to On My iPhone to keep it local, or to iCloud Drive to reach it from a Mac.
Specs
Apple Music on iPhone can't import a file directly. The simplest route is to keep the MP3 in Files and play it from there, or open it in a free player such as VLC, which builds its own library.
If you want it inside the Music app, AirDrop the file to a Mac, add it to the Music library there, and sync your iPhone.
An hour-long podcast is about 55 MB at 128 kbps and 140 MB at 320 kbps. For talk, the lower setting sounds the same and leaves room for more episodes.
Questions
Yes. Safari downloads the MP3 straight to the Files app.
Open Files → Downloads and tap the file. It keeps playing when you lock the screen.
Not directly on the phone. Sync it from a Mac or PC, or use a player app such as VLC.
Yes, the steps are identical on iPadOS.
More tools
Ko-fi
SaveToMP4 has no accounts and no paywall. If it saved you time, a coffee helps cover the servers.