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MP4 to MP3

Extract audio tracks from MP4, MOV, AVI, and other video files. Save as MP3, WAV, or AAC with custom bitrate settings. Free to use in the browser, and signup is not required to start.

Free in browser No sign-up required Files stay on your device
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Upload Video

Drop video here or click to upload

MP4, MOV, AVI, MKV, WebM

Result

Upload a video to extract audio

Files processed locally — never uploaded
How it works

Run this tool in three short steps.

01

Upload your video

Drop a video file or click to browse. MP4, MOV, AVI, MKV, WebM supported.

02

Choose audio format

Select MP3, WAV, or AAC. Adjust bitrate for quality vs. file size.

03

Download audio

Preview the extracted audio, then download.

Questions

What people ask before they use this tool.

How does MP4 to MP3 conversion work?
FFmpeg WebAssembly runs in your browser and strips the video track, keeping only the audio. The audio is re-encoded to your chosen format (MP3, WAV, or AAC). Source files are not uploaded to our servers during conversion.
What video formats are supported as input?
MP4, MOV, AVI, MKV, WebM, and most common video formats. Any video with an audio track can be converted.
What audio formats can I output?
MP3 (default, most compatible), WAV (uncompressed, highest quality), and AAC (small file, good quality). Choose based on your needs.
What bitrate should I choose?
128kbps is fine for speech and podcasts. 192kbps is good for music. 256kbps and 320kbps can be useful when you want to preserve more of the source detail.
Is the audio quality affected by the conversion?
Slightly — re-encoding always involves minor quality loss. For music, use 256kbps or higher. For speech, 128kbps is often sufficient. WAV output is lossless.
Is my file uploaded to a server?
No. FFmpeg runs in your browser via WebAssembly. Source video files are processed locally and are not uploaded to our servers.
Why does the first conversion take longer?
The FFmpeg WebAssembly engine (~31MB) downloads on first use. Cached after that — subsequent conversions start instantly.
Can I extract audio from a YouTube video?
Not directly from YouTube. Download the video first, then upload it here. Or use our <a href="/youtube-summarizer">YouTube Summarizer</a> for text transcripts.
Does it work on mobile?
Yes. Audio extraction is relatively fast. Most phones handle it well for videos under 10 minutes.
What is the file size limit?
Depends on your device memory. Most handle videos up to 500MB. Audio extraction is faster than video compression since no re-encoding of video is needed.
How long does extraction take?
Fast — usually a few seconds for a 5-minute video. Audio extraction is much faster than video compression because only the audio stream needs processing.
Can I convert multiple files at once?
One at a time currently. After downloading, click "Change file" to process the next video.
What is the difference between MP3, WAV, and AAC?
MP3: most compatible, good compression. WAV: uncompressed, largest file, lossless quality. AAC: better compression than MP3, used by Apple/YouTube. For most uses, MP3 at 192kbps is the best balance.
Is it really free?
Yes. The browser tool is free to use, and signup is not required to start.
Can I pay with cryptocurrency?
Video tools are free. For AI writing tools with premium tiers, we accept USDT, USDC, BTC, ETH. Plans start at $9.99/month.
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Coda One's MP4 to MP3 converter extracts audio from video files using FFmpeg WebAssembly in your browser. It supports MP4, MOV, AVI, MKV, and WebM input plus MP3, WAV, and AAC output. Choose your preferred bitrate. Source files are processed locally and are not uploaded to our servers during conversion.

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