Free Media Tools

MP4 to MP3 Converter

Convert MP4 video to MP3 audio online free in your browser. Extract audio from short video files without uploading.

Client-side

Media output

Input size

No file

Output size

Not ready

Limit

50 MB

Engine

ffmpeg.wasm

The ffmpeg WebAssembly engine loads only on this page and only after you start processing.

Media Tools

About MP4 to MP3 Converter

Convert MP4 video to MP3 audio online free in your browser. Extract audio from short video files without uploading. The work happens in your browser, so your input stays on your device while you prepare the result.

Extracting audio from short recordings, lectures, clips and screen captures.

Creating a smaller audio-only download while keeping the source file on your device.

Practical notes

Only convert files you have the right to process.
Long videos can take time because audio extraction runs inside the browser.

Common questions

Does this tool upload my data?

No. The tool runs in your browser and keeps the selected content on your device.

Is this tool free?

Yes. It is free to use in the browser and does not require an account.