MP4 to MP3 Converter
Turn the sound of an MP4 or MOV video into an MP3, right in your browser. Free for videos up to 15 minutes, no upload, works on your phone.
Convert MP4 to MP3No signup, no upload, no watermark. Longer videos: free as M4A or WAV, MP3 with Pro.
How to convert MP4 to MP3 in 3 steps
Nothing to install, nothing to upload.
Open the video
An MP4, MOV, M4V or 3GP file from your computer, or a video from your phone's photos. It stays on your device.
The sound comes out
ChunkAudio takes the sound track out of the video at once and shows it ready to save.
Download the MP3
Pick 192 or 320 kbps and save the MP3. The untouched M4A and a WAV are there too.
A converter that keeps your video to itself
Most online converters upload your file first. This one does not.
Nothing is uploaded
The video stays on your device and the MP3 is encoded in your browser. Private recordings stay private.
192 or 320 kbps
Clear MP3s for speech and music, encoded straight from the video's own sound track.
Works on your phone
Convert the videos in your iPhone or Android photo library without installing an app.
MP4, MOV, M4V and 3GP
Phone videos, screen recordings and meeting recordings: the formats people actually have.
The original sound as M4A
Need the exact sound instead? The untouched M4A is free at any length, next to the MP3.
Cut and split right after
Keep only the part you need, split a long recording or shorten the pauses, in the same app.
What people convert
Videos where the sound is what you want to keep.
Music you filmed
A concert, a rehearsal or a session, as an MP3 for your player.
Meeting recordings
The sound of a Zoom or Teams MP4 for transcription or listening on the go.
Lectures and courses
A recorded class as an MP3 to revise on a walk.
Interviews and podcasts
The audio of a filmed conversation for the edit or the transcriber.
Voice and video messages
Save the sound of a video message as a small MP3 you can forward.
Listening in the car
Turn video talks into MP3s for a player or a USB stick.
Frequently asked questions
Is the MP4 to MP3 converter free?
Yes, for videos up to 15 minutes: open the video, download the MP3, no signup and no watermark. Longer videos come out free as M4A (the original sound, untouched) or WAV; the MP3 of a video over 15 minutes needs ChunkAudio Pro, a 7-day pass for €4.99, a yearly plan or a lifetime licence.
Is my video uploaded?
No. The video is read on your own device and the MP3 is encoded in your browser. Nothing is sent to a server, so a private recording stays private, and a big file does not have to travel anywhere first.
Which videos can I convert?
MP4, MOV, M4V and 3GP videos with AAC or Apple Lossless sound: phone videos, screen recordings, Zoom and Teams recordings and most video files. WebM works as well. It converts files you have; it does not download videos from YouTube or other sites.
What MP3 quality do I get?
192 kbps by default, which sounds the same as the original for speech and most music, or 320 kbps if you choose it under the result. The MP3 is encoded from the video's own sound track, so nothing is lost before the encoding.
Can I convert MOV to MP3?
Yes. MOV files from an iPhone or a Mac work the same way as MP4: open the file and download the MP3.
Does it work on iPhone and Android?
Yes. Tap Convert MP4 to MP3, pick the video from your photos or files, and save the MP3. The encoding runs on the phone, so very long videos are better done on a computer.
Why would I keep the M4A instead?
The M4A is the video's sound exactly as it was, copied without re-encoding, and usually smaller than the MP3. It plays on iPhone, Android, Windows and Mac. Choose MP3 when a device, an app or a person asks for MP3.
Can I cut the audio or split it into parts?
Yes. After the conversion the same app cuts a section, splits the audio into equal parts, shortens long pauses and measures the loudness.
Convert your video now
Open the MP4, download the MP3. Your file never leaves your browser.
Convert MP4 to MP3