Pull the soundtrack out of MP4, MOV, WebM, and MKV video and save it as MP3 or WAV. Nothing is uploaded, so even a large video stays put.
Video to audio pulls the soundtrack out of MP4, MOV, WebM, and MKV files and hands it back as MP3 or WAV. A video file is really a container holding separate video and audio streams alongside each other, so extracting the audio is less like conversion and more like opening the box and taking one thing out of it.
Use it to get the audio from a lecture or interview you filmed, lift a soundtrack for editing, or turn a video into something you can listen to on the move — in effect converting your own MP4 to MP3 from a file you already have. Everything runs in your browser, so a large video isn't uploaded anywhere — the practical ceiling is your own device's memory rather than someone's file-size limit. How to extract audio from video covers the details. Need a different format afterwards? Use the audio converter.
MP4, MOV, WebM, and MKV are the main supported containers, and common variants like M4V generally work too. The tool reads the video's audio track directly and re-encodes just that, ignoring the picture entirely, so it doesn't matter how large or high-resolution the video is — only the audio is processed and downloaded.
Two options: MP3, which is small and plays on virtually everything (choose the bitrate to trade size against quality), or WAV, a lossless copy of the decoded audio track that's best if you plan to edit it further. MP3 is the right pick for listening or sharing; WAV is the right pick if the audio is going into another editing tool afterward.
No. The whole extraction happens inside your browser using a local WebAssembly audio engine — your video is never uploaded, which matters for personal recordings, unreleased footage, or anything you'd rather not put on someone else's server. The only network request is a one-time download of the engine itself to your browser on first use, after which it's cached. You can prove it by extracting once, going offline, and extracting again.
If the file has no audio stream, the tool will tell you rather than produce an empty file. This can happen with screen recordings made without audio or videos that were exported muted. Otherwise, any standard video with a normal audio track will extract cleanly.
Yes — 300 MB per file, since everything is processed in your browser's memory. You'll get a clear message if a file is over the limit instead of the tab crashing. Because only the audio is re-encoded (not the video), extraction is usually quick even for longer clips, and the progress bar shows real progress.
Yes — extracting the audio from an MP4 and saving it as MP3 is exactly what this does, working from the MP4 file you already have on your device (there's no video URL or link box — nothing is fetched from the web). Drop in the MP4, choose MP3 as the output and pick a bitrate, and you get the soundtrack as an MP3. The same works for MOV, WebM, and MKV. Everything runs in your browser, so even a large video is never uploaded.