Convert an MP4 Video to MP3
Extract the soundtrack from any video into MP3: music, podcast, lecture, or voice note. Free, no software, and your video is never uploaded.
- MP4, MOV, MKV, WebM
- Up to 320 kbps
- No software
- 100% private
100% private — Everything is processed directly in your browser: your files, voice, and image are never sent to Chatzam's servers.
How to convert MP4 to MP3?
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Upload the video
Drag your MP4, MOV, MKV, AVI, or WebM file into the area.
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Choose the quality
128 kbps for voice, 192 kbps for a good balance, 320 kbps for music.
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Download the MP3
Listen to the result directly on the page, then download it.
Hassle-free audio extraction
Every video format
MP4, MOV (iPhone), MKV, AVI, WebM, 3GP: the soundtrack is extracted regardless of format.
Choice of quality
From lightweight MP3 for voice to 320 kbps for music.
FFmpeg engine
The reference for audio and video conversion, run directly in your browser.
No upload
Your video is converted on your device: nothing is uploaded.
Extract the sound from a video into MP3
Want to keep the music from a clip, listen to a lecture or a talk on the go, or recover a voice note recorded as video? Converting the video to MP3 keeps only the audio, in a much lighter file playable on any device.
What MP3 quality should you choose?
128 kbps is enough for voice (podcast, lecture, meeting) and gives a light file. 192 kbps is an excellent trade-off for music. 320 kbps offers the best possible MP3 quality, at the cost of a larger file. Quality can never exceed that of the original audio.
A local conversion powered by FFmpeg
The tool uses FFmpeg, compiled to run in the browser. On first use, the engine (about 30 MB) is downloaded, then cached; the conversion then happens entirely on your device.
Frequently Asked Questions
Is MP4 to MP3 conversion free?
Yes, free, with no sign-up and no limit.
Can I convert any video?
Yes, any video on your device. Respect copyright: only convert content you have the right to use.
Is there a maximum size?
There's no fixed limit, but the browser works in memory: beyond 500 MB, conversion may be slow or fail on modest devices.
Is my video sent to a server?
No. Only the conversion engine is downloaded; your video stays on your device.