MP4 to MP3
Drag the video, tap Shift and drop it on Audio as MP3. PlanetOS saves the soundtrack as an MP3 next to the video, ready for a music app, a podcast editor or a transcription service.
How to convert MP4 to MP3
- 1
Start dragging the MP4 file, from the desktop or any folder.
- 2
While you're still holding it, tap Shift. A ring of planets opens around the file, one for each format it can become.
- 3
Drop the file on the MP3 planet. The MP3 copy appears next to the original a moment later.
Other ways to keep the sound
The Tools ring also has Extract audio, which saves the sound as M4A. M4A is slightly better quality at the same size; MP3 plays on more devices.
You can set the MP3 bit rate in Settings → Formats. There's a longer walk-through in How to extract audio from a video.
PlanetOS does all of this on your computer. Your files are never uploaded, and it works without an internet connection.
Questions
Does it work for MOV, MKV and WebM?
Yes, any video PlanetOS can open.
Can I save audio from an online video?
Copy the link and press the download shortcut (⌃⇧D on a Mac, Ctrl+Shift+D on Windows), then pick Audio.