Private media conversion
MP4 to MP3 Converter
Extract the complete soundtrack from an MP4 and save it as a widely compatible 192 kbps MP3.
The engine downloads once from a CDN. Your media remains on this device.
How to use the mp4 to mp3 converter
- STEP 1Choose a MP4 file up to 200 MB.
- STEP 2Convert it locally to MP3.
- STEP 3Download the finished MP3 file.
About this tool
Turn interviews, lectures, recordings, performances, and other videos into portable audio when the picture track is no longer needed.
The video stream is discarded and only its audio is decoded and encoded to MP3.
Processing time depends on duration, source bitrate, output format, and device performance.
Frequently asked questions
Will MP3 retain the MP4 video?
No. MP3 is an audio-only format. The downloaded file contains the soundtrack but no image or video frames.
Is my MP4 file uploaded?
No. FFmpeg WebAssembly performs the conversion in your browser. The engine downloads from a CDN, but your media stays on your device.
What is the maximum file size?
The browser converter accepts files up to 200 MB. Long files may require substantial device memory.