MP4 to MP3 Converter
Extract the audio track from a video clip, right in your browser.
100% processing in your browser. Your files never leave your device.
How MP4 to MP3 Converter works
Pick your video
Drop an MP4 or MOV onto the belt. The scanner reads the container and finds the audio stream, usually AAC.
Set the bitrate and extract
ffmpeg.wasm discards the video track and re-encodes only the audio to MP3 at your chosen bitrate — 128k for voice, 320k for music.
Take the MP3
The result lands in the output zone with its final size shown. Your original clip is left untouched on disk.
Why PixlPulse
Privacy
Your clips are never uploaded, however large or however personal.
Free
No subscription and none of the per-minute limits online converters impose.
Offline
The ffmpeg.wasm engine is fetched once and then stays cached.
Fast
No upload time — on a 200 MB clip that is usually most of the wait.
About MP4 to MP3 Converter
Extracting audio from a video file is useful for podcasters, musicians, or anyone who wants a clip's soundtrack without the video. This MP4 to MP3 converter reads the MP4/MOV container, decodes the audio stream (usually AAC), and re-encodes it to MP3 at your chosen bitrate — directly in your browser, with no server upload. Choose between 128 and 320 kbps depending on your needs: 128k for voice/podcasts, 320k for high-quality music. The original file stays untouched, and the result can be downloaded as soon as the conveyor reaches the output zone.
Frequently asked questions
No. Decoding and re-encoding happen locally, powered by ffmpeg.wasm running directly in your browser. The file never leaves your device.
For voice or podcasts, 128–192 kbps is enough. For music, we recommend 256–320 kbps to keep the original quality as close as possible.
MP4 and MOV are supported directly. Most clips filmed on a phone or downloaded online work without issues.
The limit depends on available browser memory, not a server. Files of a few hundred MB work fine on a modern laptop.