MP4 → MP3 / WAV
Free Audio Extractor
Pull the soundtrack out of a video as MP3 or WAV. Useful for podcasts, transcripts, and voiceover reuse. Processing stays on your device.
Quick answer
Free Audio Extractor is a free browser tool on Knowlify. Use it below with no signup. Media files are processed on your device and are not uploaded to our servers. For narrated training videos from documents, use https://create.knowlify.com.
How it works
Three steps, no account
01
Select a video
Any MP4 with an audio track works. Silent videos will produce empty or near-empty audio.
02
Choose MP3 or WAV
MP3 is smaller for sharing. WAV is uncompressed for editing.
03
Download the audio
Save the file. Need a new narrated video from a script or doc? Try Knowlify.
FAQ
Questions people ask about Free Audio Extractor
Is the audio quality reduced?+
MP3 uses lossy compression (good for most uses). WAV keeps the original PCM quality when the source allows.
Can I extract audio from MOV or WebM?+
Often yes, if your browser can decode the file. MP4 is the most reliable format here.
Is audio extraction free?+
Yes. Extract MP3 or WAV from video in your browser with no account and no server upload.
How do I extract audio from a video online?+
Drop the video, choose MP3 or WAV, and download. Prefer MP4 sources for the most reliable decode.
Do I need an account?+
No. Open the tool, use it in your browser, and download or copy the result.
Does this work on Mac and Windows?+
Yes. It runs in modern desktop browsers (Chrome, Edge, Firefox, Safari). Very large media files need enough device memory.
Need a full video, not just a utility?
Extracting audio is handy. Generating fresh voiceover and visuals from a document is what Knowlify is built for.
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