Video to MP3 Converter
Extract audio from a video in seconds: drop an MP4, MOV, MKV, WebM or AVI and save its soundtrack as MP3, M4A or WAV. AAC audio can be copied to M4A with no quality loss. Everything runs in your browser, with no upload.
Drop a video or click to choose
MP4 · MOV · WebM · MKV · AVI
Files are processed on your device. The FFmpeg engine (~30 MB) is downloaded once from a CDN and then cached by your browser. Because ffmpeg.wasm keeps files in memory, very large files (over ~500 MB) may fail on phones or low-memory computers.
How to convert a video to MP3
- Add a video. Drop an MP4, MOV, WebM, MKV or AVI file onto the drop zone, or click to choose one. The duration and audio track details are shown.
- Choose MP3, M4A or WAV. Pick MP3 and a bitrate for maximum compatibility, M4A to copy AAC audio without re-encoding, or WAV for uncompressed audio.
- Optionally trim. Tick Extract only part of the video and set start and end times, or use the current video position.
- Extract and download. Click Extract, listen to the result in the player, and download the audio file.
MP3, M4A or WAV: which should you pick?
- MP3: plays on everything, from car stereos to old MP3 players. 192 kbps suits music; 128 kbps is plenty for speech, lectures and podcasts.
- M4A: best quality and fastest. Phone and camera videos usually contain AAC audio, which is copied straight into the .m4a file without re-encoding.
- WAV: uncompressed audio for editing in Audacity, Premiere or a DAW. Files are large, about 10 MB per minute of stereo.
Re-encoding can't add quality the video never had, so there is no benefit in choosing 320 kbps MP3 for a video whose audio track is 128 kbps AAC.
Tips
- Need a ringtone or a short clip from the soundtrack? Extract it here, then fine-tune it in the Audio Cutter.
- To convert many audio files at once or normalize their volume, use the Audio Converter.
- Screen recordings with no sound have no audio track; the tool tells you when that is the case.
Private: your video stays on your device
The file is processed on your device; the FFmpeg engine (~30 MB) is downloaded once from a CDN and then cached. The video is read directly from disk, so private recordings, meetings and family videos never leave your computer or phone.
Frequently Asked Questions
How do I convert MP4 to MP3?↓
Drop the MP4 onto the converter, choose MP3 and a bitrate (192 kbps is a good default), and click Extract. The audio track is encoded to MP3 in your browser and you can play it and download it right away.
What is the fastest way to extract audio without losing quality?↓
Choose M4A. Most MP4 and MOV videos store their sound as AAC, and the tool copies that AAC stream into an .m4a file without re-encoding, which takes seconds and keeps the original quality exactly. If the audio is not AAC, it is encoded to AAC instead.
Is my video uploaded to a server?↓
No. The video is read directly from your device by FFmpeg running in WebAssembly in your browser. Only the FFmpeg engine (about 30 MB) is downloaded once from a CDN; your video never leaves your computer or phone.
Can I extract only part of the audio?↓
Yes. Tick Extract only part of the video and enter start and end times, or play the video to the right spot and click Use current video time. Only that section is saved.
Which video formats are supported?↓
MP4, MOV, M4V, WebM, MKV, AVI, WMV, FLV, MPEG-TS and most other common containers. Some formats such as MKV and AVI cannot be previewed in every browser, but their audio can still be extracted.
Is there a video size limit?↓
The video is read from disk rather than loaded whole, so large files usually work, but ffmpeg.wasm runs inside a 2 GB browser memory limit. Multi-gigabyte videos or very long WAV exports may fail, especially on phones.
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