Save the soundtrack of an MP4, MOV, MKV or WebM video as an audio file — WAV for editing, MP3 for listening. Free with a DefyAudio account; the video never leaves your device.
Open the Audio Studio
Go to the DefyAudio Studio — the extraction runs in your browser.
Add your video
Drag and drop or browse for an MP4, MOV, MKV or WebM file. DefyAudio reads the video and takes its audio track.
Choose the output format
In the Format tab, pick WAV to keep the sound uncompressed for editing, MP3 for a small file that plays everywhere, or FLAC, OGG or AAC (.m4a).
Trim if you need to (optional)
Drag the start and end handles on the waveform to keep only part of the soundtrack.
Export
Export the audio. It is extracted on your device and downloads straight away.
Four video containers
MP4, MOV, MKV and WebM — the audio track is read from each.
Five audio formats out
WAV, MP3, FLAC, OGG or AAC (.m4a), with sample rate, channels and bitrate under your control.
Edit after extracting
Trim, split into tracks, join or clean up the extracted audio in the same Studio.
An audio extractor takes the soundtrack out of a video file and saves it as an audio file you can play, edit or share. It is the quickest way to keep the sound of an interview, a lecture, a music video, a screen recording or a phone clip without the picture.
DefyAudio reads the video and decodes its audio in your browser through WebAssembly — nothing is uploaded, so private recordings stay on your device.
Choose WAV when the audio is going to be edited, mixed or archived: it stores the sound uncompressed, so no further quality is lost on the way. Expect a large file — roughly 10 MB per minute at 44.1 kHz stereo, 16-bit.
Choose MP3 when you just want to listen to or share the soundtrack. You set the bitrate, from 64 to 320 kbps; 192 kbps or more suits music, 128 kbps is plenty for speech.
Either way, the result cannot be better than the audio stored in the video, which is almost always already compressed. WAV keeps what is there; it does not restore what the video's encoder threw away.
Open DefyAudio's Studio, drop in your MP4, MOV, MKV or WebM video, choose WAV or MP3 in the Format tab and export. It is free with a DefyAudio account and the video is not uploaded.
Add the MP4 to the Studio, select WAV as the output format, and export. You can also choose the sample rate (44.1, 48 or 96 kHz) and bit depth (16, 24 or 32-bit).
MP4, MOV, MKV and WebM.
No. The video is read and decoded locally in your browser, so it never leaves your device.
Yes. Set the start and end handles on the waveform before exporting, and only that section is saved.