How to Convert MP4 to MP3 on iPhone
· 4 min read · ConvertEase Team
Quick answer
To convert MP4 to MP3 on iPhone without a computer, install the free ConvertEase app, tap Audio, select your MP4 video, choose MP3 as the output, and tap Convert. The audio track is extracted on your iPhone and saved as an MP3 in seconds — nothing is uploaded.
Sometimes you only want the sound from a video — a song, a lecture, a podcast clip, an interview or a voice recording. Converting an MP4 to MP3 strips out the audio so you can listen with the screen off, save space, or use it as a ringtone. Here's how to do it on your iPhone, no computer required.
Why convert MP4 to MP3?
- Listen anywhere — play audio with your screen off or in the background, like a podcast.
- Much smaller files — audio-only is a fraction of the size of the full video.
- Save just the sound — keep the song, talk or recording without the picture.
- Use it elsewhere — ringtones, voice notes, audio editing or sharing.
How to convert MP4 to MP3 on iPhone (step by step)
A dedicated on-device converter extracts the audio instantly and keeps your video private.
- Download ConvertEase free from the App Store and open it.
- Tap Audio, then select the MP4 video from your library or the Files app.
- Choose MP3 as the output and pick the audio quality (bitrate).
- Tap Convert — the audio is extracted on-device and saved as an MP3 in seconds.
Want other audio formats like WAV, M4A or AAC? See our iPhone audio converter.
MP4 to MP3: app vs. online converter
| Method | Speed | Privacy | Quality control |
|---|---|---|---|
| ConvertEase (on-device app) | Instant, batch | Video never leaves your iPhone | Choose the MP3 bitrate |
| Online MP4 to MP3 site | Slow (upload + download) | Video uploaded to a server | Often fixed / capped |
Videos are large, so uploading them to an online converter is slow and exposes private footage. On-device extraction is faster and keeps the file on your phone.
Tip: trim before you convert
Only need a portion — a chorus, a quote, a single answer? Trim the video first in the Photos app, then convert the trimmed clip to MP3 so the audio file contains just the part you want.
Frequently asked questions
Use ConvertEase: tap Audio, select your MP4, choose MP3, Convert. The app pulls out the audio track and saves it as an MP3 on your iPhone — no computer or upload.
Yes. A new MP3 is created and your original MP4 stays untouched in your library.
Yes. The MP3 keeps the quality of the video's audio track, and you can choose the bitrate to balance quality and file size.
ConvertEase is free to download and extracts audio entirely on-device, so your video never leaves your iPhone and it works offline.