Convert MP4 to MP3 Free
Extract high quality MP3 sound from MP4 video clips in your browser.
- 100% free
- Files stay on your device
- No sign-up, no watermark
Select video to extract audio
Supports MP4, MOV, WEBM, AVI, MKV
What is MP4 to MP3 converter?
MP4 to MP3 extracts the audio track from an MP4 video and saves it as an MP3 — useful for lectures, interviews, podcasts recorded on video, and music clips. Choose 128, 192, 256 or 320 kbps, preview the result in the built-in player, and download. The conversion uses ffmpeg compiled to WebAssembly and runs entirely in your browser; the video engine (about 31 MB) downloads once and is then cached.
How to use MP4 to MP3 converter
- 1
Step 1
Select the MP4 video.
- 2
Step 2
Choose the MP3 bitrate: 128, 192, 256 or 320 kbps.
- 3
Step 3
Convert, preview the audio, and download the MP3.
Frequently asked questions
Which bitrate should I choose?
192 kbps is a good default. Use 128 kbps for speech to save space and 256–320 kbps for music. A higher bitrate cannot add quality the original audio did not have.
Can I extract audio from MOV, WebM or AVI?
Yes — use the Video to MP3 tool, which accepts MP4, MOV, WebM and AVI files.
Is my video uploaded?
No. The audio is extracted on your device with ffmpeg.wasm; the video never leaves your browser.
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