Free MP4 to MP3 Online
Extract audio from MP4 video files and save as MP3. Fast, free, and entirely processed in your browser.
Files never uploaded
Instant processing
100% free
Frequently Asked Questions
How does the MP4 to MP3 extraction work?▾
We use FFmpeg.wasm, a webassembly port of the famous FFmpeg multimedia framework. It allows us to process video files directly in your browser without any server-side processing, ensuring your data stays private.
Is there a file size limit?▾
Since the processing happens in your browser's memory, we recommend files under 100MB for the best experience. Larger files may cause your browser to slow down or crash depending on your device's RAM.
Will the audio quality be maintained?▾
Yes, we extract the audio stream directly and re-encode it to high-quality MP3 format, preserving as much clarity as possible from the original source.