You can turn a video into an audio file on your phone without installing anything. Open a web converter in your phone’s browser, pick the video, and download the MP3. This works on both iPhone and Android.
The Quick Way
- Open the free MP4 to MP3 converter in Safari (iPhone) or Chrome (Android).
- Tap to choose your video file, or the area that says to upload one.
- Start the conversion and wait for it to finish.
- Tap Download and save the MP3.
For a desktop walkthrough with more options, see convert MP4 to MP3 free online.
On iPhone
- Open the converter page in Safari.
- When asked to select a file, choose from Photo Library, Take Photo or Video, or Choose Files, depending on where the video is. Videos you filmed are normally in the Photo Library.
- Convert, then tap Download. Safari shows a download icon in the address bar.
- Find the MP3 in the Files app, usually under Downloads. From there you can share it, play it, or move it into another app.
iPhone’s Music app doesn’t import MP3s directly from Files without extra steps, so for listening it’s often simplest to play the file from Files or send it to another audio app.
On Android
- Open the converter page in Chrome.
- Tap the upload area and pick the video from your gallery or the Files app.
- Convert and download.
- The MP3 saves to your Downloads folder. Open it in your music player, or move it into your Music folder so music apps find it.
Make the Upload Faster
Large videos take longer to upload and convert, especially on mobile data.
- Use Wi-Fi for big files.
- Trim first if you only need part of the audio, using your phone’s built-in editor.
- Compress the video first with the video compressor if the file is very large. Compression shrinks the picture but doesn’t hurt audio you plan to extract much.
Will the Audio Quality Drop?
MP3 is a compressed audio format, so converting to it is lossy. The sound is usually indistinguishable from the video’s audio for everyday listening, because most video audio is already compressed (often AAC). For the details, see extract audio from video without quality loss, and for a comparison of formats, AAC vs MP3.
Troubleshooting
- The upload stalls. Switch to Wi-Fi, keep the browser tab open, and try a smaller file.
- I can’t find the file afterward. On iPhone check the Files app; on Android check Downloads.
- There’s no sound in the MP3. The video may have had no audio track. Play the original to confirm.
- The file won’t open. Make sure the download finished. Try a different player app.
- I want a ringtone. Trim the audio to about 30 seconds in a free audio editor first, then set it as your ringtone using your phone’s settings.
Respect Copyright
Only convert audio you made, own, or have permission to use. Our guide to downloading videos from social media: the legal side covers the basics.
Frequently Asked Questions
Can I convert MP4 to MP3 on iPhone without an app?
Yes. Use a web converter in Safari and save the result to the Files app.
Is there an MP4 to MP3 converter for Android that is free?
Yes. Open a browser-based converter in Chrome, with no installation.
Where do converted files go on my phone?
Usually the Downloads folder (Android) or the Files app (iPhone).
Does the video file get changed?
No. Your original video is untouched; you get a separate MP3.
Can I do a whole batch at once?
Convert files one at a time, or use a desktop tool for large batches.