MP4 to MP3
Keep the sound from an MP4 and save it as an MP3.
Video tools use FFmpeg (GPL-2.0-or-later).
About this tool
Talks, music videos, and voice notes often live in an MP4 when you only wanted the sound. This page encodes that audio as MP3 in the browser. The picture is discarded.
It is not a stem splitter and not a YouTube grabber. Silent MP4s still produce a short or empty MP3. For muting a video while keeping the picture, use Mute video / extract audio.
ffmpeg.wasm reads the MP4 locally and writes MP3. 50 MB. Large files warn that the tab may hitch. Codecs the WASM build cannot decode will fail closed.
How to convert MP4 to MP3
- Choose an MP4. It stays on your device.
- Convert. Only the audio is kept.
- Download the MP3.
50 MB. Not for platform downloads. Unusual audio codecs inside MP4 may not decode.
FAQ
- Does pulling MP3 from an MP4 use a remote encoder?
- No. Extraction is local.
- Is this ripping a streaming site?
- No. ConvertWarp does not fetch other people’s video URLs. You pick a file you already have.
- WAV instead of MP3?
- Audio converter can target WAV. This page is MP3 for a smaller shareable file.
- Will ID3 tags copy?
- Container tags are not a guaranteed copy. Treat the MP3 as a new encode of the sound.
- Need a clip, not the whole file?
- Trim video first, then convert, or extract and edit the MP3 elsewhere.
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Continue
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