Is MP4 to MP3 free? Is there a watermark?

Yes — MP4 to MP3 is free to use with no sign-up or watermark. Very large files can still be limited by your browser's available memory and processing resources.

Do my files get uploaded to a server?

No. MP4 to MP3 runs entirely in your browser with WebAssembly, so your MP4, MOV, WebM, MKV file never leaves your device and nothing is stored or seen by us.

What can I put in, and what do I get out?

MP4 to MP3 accepts MP4, MOV, WebM, MKV and gives you back a MP3 file. You can also set quality before you run it. Actual codec support depends on what the bundled engine or browser decoder can read.

What quality is the MP3 audio?

The default audio stream is encoded as MP3 at the bitrate you select. The conversion is lossy and cannot improve an already-compressed source.

Free tools · Extract

MP4 to MP3

Extract the soundtrack from an MP4 (or MOV, WebM) and save it as an MP3 — great for pulling music, a voiceover, or a podcast out of a video. Choose the bitrate. Browser-only, no upload.

Runs entirely in your browser. Your file is never uploaded — no watermark, no account.

Drop a file or click to chooseMP4, MOV, WebM, MKV

Get a better result

Best for: Extracting a soundtrack, voiceover, interview, or podcast from video while choosing an explicit MP3 delivery bitrate.
Input → output: The default audio stream from MP4, MOV, WebM, or MKV becomes MP3 at 128, 192, or 320 kbps; picture data is discarded.
Quality tip: Use 192 kbps for voice and general listening, or 320 kbps for a strong music source when size is secondary. Compare against the video.
Know before running: The encode is lossy, does not expose alternate-track selection, and cannot improve source audio already damaged by compression. Inputs without audio fail.
Next step: Compress audio if delivery size matters more than extraction bitrate.

How to use MP4 to MP3

1
Choose your file. Drop a supported MP4, MOV, WebM, MKV file into the tool, or click to select one. It stays on your device — nothing is uploaded.
2
Pick your settings. Adjust the available options, then press Run. The first processing run loads the browser engine before conversion begins.
3
Download. Review the result, then download the finished file from your browser with no watermark.

Frequently asked questions

Is MP4 to MP3 free? Is there a watermark?: Yes — MP4 to MP3 is free to use with no sign-up or watermark. Very large files can still be limited by your browser's available memory and processing resources.
Do my files get uploaded to a server?: No. MP4 to MP3 runs entirely in your browser with WebAssembly, so your MP4, MOV, WebM, MKV file never leaves your device and nothing is stored or seen by us.
What can I put in, and what do I get out?: MP4 to MP3 accepts MP4, MOV, WebM, MKV and gives you back a MP3 file. You can also set quality before you run it. Actual codec support depends on what the bundled engine or browser decoder can read.
What quality is the MP3 audio?: The default audio stream is encoded as MP3 at the bitrate you select. The conversion is lossy and cannot improve an already-compressed source.