MP4 to MP3 Converter
Extract audio from MP4 video directly in your browser.
Browser RAM • 0 Uploads
Engine: FFmpeg WebAssemblyFormats: MP4, M4VMax Guide: 200MB RAM
Loading MP4 to MP3 processor...
Zero-Upload In-Browser Execution GuaranteeVerified Local RAM
Processed directly on your device. Nothing is uploaded. This tool uses native Web APIs, Canvas, and client-side WebAssembly to process your files inside local browser RAM. No server receives your file, no telemetry logs your data, and no account is required.
Key Capabilities
- Runs FFmpeg WebAssembly locally inside your browser thread
- Bitrate options: 128 kbps, 192 kbps, 256 kbps, 320 kbps
- No file size or privacy leaks over network
- Audio player preview before downloading
How To Use
1
Upload MP4
Drop your MP4 video file.
2
Choose Bitrate
Select desired audio fidelity.
3
Extract & Save
Process locally and download your MP3.
Frequently Asked Questions
Is the video uploaded to a cloud server?
No! FFmpeg is compiled to WebAssembly and executes right inside your browser on your device.
What is the recommended video size?
For smooth browser processing, files under 200MB are recommended.