Convert MP4 to MP3
Drop an MP4 from your phone or computer here and save the sound as an MP3.
Also as MP4 to WAV.
No file open
Stays on this device
Drop a file here
Audio or video, up to 500MB, 20 min
MP4 to MP3 converter
Pick a format.
It all happens in your browser, so even a big video doesn't wait on an upload.
How it works
- 01
Drop your MP4 in
From your camera roll, a download, or an export from your video editor. Drop it on the tool at the top of this page, or tap Choose a file. Up to 500MB and 20 minutes.
- 02
It converts right there
The sound comes out in your browser while you watch. Nothing is uploaded, so even a big file doesn't wait.
- 03
Download the MP3
The Download button is already on MP3, and the format beside the tool (the Convert tab on phones) switches it to MP3, M4A, WAV, FLAC or WebM. Only want part of it? Tap Trim and extract first.
What people use it for
- Keep the song from a concert video you filmed.
- Listen to a recorded talk or lecture on the go.
- Pull the audio of an interview to edit or transcribe.
- Get the sound of a clip for your own edit.
- Keep a recorded meeting or class as audio you can play in the car.
What's inside an MP4, and what happens to its sound
MP4 is a container: one file that holds the picture, the sound and sometimes subtitles side by side. The picture inside is usually H.264, HEVC or AV1, and the sound is almost always AAC. Only the sound is read here: the picture is skipped, so the size of the picture doesn't slow the conversion down.
AAC and MP3 are both compressed, so MP4 to MP3 is a re-encode, not a copy. Extractune decodes the video's sound and writes the MP3 straight from it at 320kbps, the highest rate MP3 has, with no step in between. For listening that's plenty. If you're going to edit the audio and save it again, take MP4 to WAV instead, so each save doesn't compress it once more.
Some MP4s carry more than one sound track, like a second language or a commentary. You get the main one, the track a video player starts with, and if the browser can't decode that one, the first track it can.
Where the MP4 comes from changes little. Android phones, GoPro and most action cameras record MP4 with AAC sound, Zoom and Teams save their recordings as MP4, and CapCut, Premiere, DaVinci Resolve and iMovie export it. A voice memo saved as M4A is the same container with no picture, so it converts the same way.
An MP3 at that rate is about 2.4MB a minute, however big the video was: the longest MP4 the converter takes, 20 minutes, comes out at about 48MB.
Questions
How do I convert MP4 to MP3?
Drop the MP4 on the tool at the top of this page, or tap Choose a file. The sound comes out right in your browser, and the Download button is already on MP3. To keep only part of it, tap Trim and extract.
What's the difference between MP3 and MP4?
MP3 is a sound-only file. MP4 is a container that holds video, sound and sometimes subtitles together, and the sound inside is usually AAC. Converting MP4 to MP3 keeps only the sound, so the file is far smaller and plays on anything that plays music.
Do I need to download or install anything?
No. The converter runs in your browser on any phone or computer, so there's no program or app to download: the only download is your MP3. Bookmark the page, or add it to your home screen, to open it like an app next time.
Can I convert an M4A to MP3 too?
Yes. An M4A is an MP4 with only sound in it. Drop it the same way and download it as MP3.
What quality is the MP3?
Good for listening on any phone, car or speaker. If you're going to edit the audio in a music or video app, download it as WAV instead: it's larger, but nothing more is lost when you edit it.
Is my MP4 uploaded to make the MP3?
No. The conversion runs in your browser, so the file never leaves your device, and a big one doesn't wait on an upload.
Is the MP4 to MP3 converter free?
Yes. No sign-up, no watermark, and no limit on how many files you convert to MP3.
More ways to get the audio
Updated