The audio is extracted 100% in your browser, so your video never leaves your device. In-browser conversion is best for files up to about 200 MB; larger files may run out of browser memory. On first use the converter engine (about 32 MB) downloads once and is cached. Only pick files from your own device — this tool does not fetch videos from links.
Pull the sound out of any video on your device and save it as a clean MP3 — for podcasts, lectures, music and voice, without uploading the file anywhere.
100% free · No sign-up · No daily limits · No watermarks · Processed in your browser — files never leave your device
Pull the sound out of any video on your device and save it as a clean MP3 — for podcasts, lectures, music and voice, without uploading the file anywhere.
A 45-minute lecture recorded as a 380 MB MP4 becomes a roughly 62 MB MP3 at 192 kbps — small enough to keep on a phone and listen to anywhere, with the lecturer’s voice perfectly clear. At 128 kbps the same lecture is about 41 MB, which is why speech rarely needs the higher settings.
The video is decoded in your browser by the FFmpeg encoder compiled to WebAssembly — the same engine our Video Compressor uses. The video stream is discarded and the audio stream is re-encoded as MP3 by the LAME encoder at the bitrate you chose, so the output is a standard MP3 that plays everywhere. Nothing is uploaded: the file is read from your device, processed in browser memory, and handed back as a download.
Downloading other people’s videos from streaming platforms breaks those platforms’ terms and usually their copyright. This tool converts files already on your device — your recordings, your exports, content you have the rights to — which is the legitimate job it is built for.
128 kbps is plenty for speech, lectures and podcasts. 192 kbps is the safe default for music and mixed content. 320 kbps is the maximum MP3 quality: use it when the source sounds great and file size does not matter. Higher than the source’s own quality gains nothing.
Re-encoding always loses a little, but at 192 kbps and above the difference is inaudible for most listeners and material — especially since most video audio starts life at 128–160 kbps anyway. Picking 320 kbps cannot restore quality the source never had.
The converter engine (about 32 MB of WebAssembly) downloads the first time any of our video tools runs, then stays in your browser’s cache. Later conversions — and the Video Compressor and Video to GIF tools — start straight away.
Use a smaller or shorter file, close other heavy tabs to free memory, and make sure the video actually contains sound. If it still fails, the file may use a codec the browser engine cannot decode; converting it to MP4 first with our Video Compressor usually fixes that.