Free browser tool
Free MP4 to MP3 Converter
Convert any MP4 video to an MP3 audio file in seconds. Choose the bitrate, then download the MP3. Everything runs privately in your browser — no upload, no sign-up, no watermark. Converting a Mac screen recording? Use the screen recording to MP3 converter, which is set up for MOV files and voice.
- No upload
- No sign-up
- No watermark
- Up to 320 kbps
Output format
Quality
Drop your video here
or click to browse — MP4, MOV, MKV, AVI, WebM
Your video never leaves your device — 100% private
Sponsored by the makers
Tired of boring screen recordings?
Try Screen Charm.
Auto-zoom, captions, motion blur, camera overlay and a vertical layout for Shorts. Record once, export a polished video.
Screen Charm is a native macOS app.
How to convert MP4 to MP3
Drop your MP4
Drag in an MP4 file or click to browse. MOV, MKV, AVI and WebM work too. Nothing is sent to a server.
Pick MP3 and a bitrate
MP3 is selected by default. Keep 192 kbps, or choose 128 kbps for speech and 320 kbps for music.
Download the MP3
The audio is extracted in your browser. Click Download to save the MP3 file.
Converting MP4 to MP3
Why convert MP4 to MP3
An MP3 is a fraction of the size of the video it came from and plays on every device, car stereo and podcast app. It's the easy way to keep the audio of a talk, lesson, interview or song without the picture.
Which bitrate to use
- 128 kbps — speech: lectures, meetings, podcasts
- 192 kbps — the best default for most videos
- 320 kbps — music and anything you'll edit later
- WAV — lossless, for audio editing
MP3 vs M4A
MP3 plays everywhere. M4A (AAC) sounds a little better at the same size and is native on Apple devices, but some older players and car stereos don't support it. When in doubt, choose MP3.
Private by design
Most online converters upload your file to their servers. This one runs FFmpeg inside your browser, so private recordings, interviews and client videos never leave your device.
Frequently Asked Questions
How do I convert MP4 to MP3 for free?
Drop the MP4 into the converter or click to browse. MP3 is selected by default, so pick a bitrate if you want and the audio is extracted right away. Click Download to save the MP3. There's no sign-up, watermark or upload.
Is my MP4 uploaded to a server?
No. The conversion runs in your browser with FFmpeg compiled to WebAssembly, so the file never leaves your device. That also means there's no file-size limit beyond your browser's memory.
What bitrate should I choose?
192 kbps is the right default and sounds the same as the original for most videos. Use 128 kbps for speech such as lectures, podcasts and meetings to get a smaller file. Use 320 kbps for music.
Will converting MP4 to MP3 lower the audio quality?
MP3 is a compressed format, so the audio is re-encoded. At 192 kbps or higher, the difference is very hard to hear. If you need an exact, lossless copy, choose WAV instead of MP3.
Can I convert other video formats to MP3?
Yes. The converter also accepts MOV, MKV, AVI and WebM, and can export M4A or WAV as well as MP3.
Does it work on iPhone and Android?
Yes, in a modern mobile browser. Long or high-resolution videos convert more slowly on phones because all the work happens on the device.
Related guides
More Free Tools
Sponsored by the makers
Tired of boring screen recordings?
Try Screen Charm.
Auto-zoom, captions, motion blur, camera overlay and a vertical layout for Shorts. Record once, export a polished video.
Screen Charm is a native macOS app.