Extract audio from a video
Pull the audio track from a video as MP3, M4A, OGG, or WAV, optionally trimming to just a section.
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How it works
Pull the audio track from a video as MP3, M4A, OGG, or WAV, optionally trimming to just a section.
Drop any video the browser can decode (MP4, WebM, MOV, MKV, AVI). A trimmer lets you drag handles to grab just part of the audio, or leave them at the ends for the whole track. Pick a format (MP3 is universal, M4A is AAC with better quality per kilobyte, OGG is Vorbis, WAV is uncompressed). For the lossy formats, set a bitrate (128, 192, 256, or 320 kbps). First use loads ffmpeg.wasm (~25 MB) from CDN, then it's cached. Processing happens locally, no upload. The trimmer doesn't snap to keyframes for audio extraction, so you can pick any start and end down to a tenth of a second. Output filename keeps the source name with the new extension.
How to use it
- Drop your video. MP4, WebM, MOV, MKV, and AVI all work — anything your browser can decode.
- Trim if you want. Drag the handles to grab just a section, or leave them at the ends for the whole track.
- Pick format and bitrate. MP3 is universal; choose 128 to 320 kbps for the lossy formats.
- Extract and download. ffmpeg.wasm loads once (~25 MB), runs locally, and the audio file downloads.
Frequently asked questions
- How do I extract MP3 from MP4 online?
- Drop the MP4, leave format on MP3, hit Extract. The first run loads ffmpeg.wasm, which takes a few seconds; after that it's instant.
- Can I extract just part of the audio?
- Yes. Drag the trimmer handles on the video preview to set start and end, then extract just that range.
- Why MP3 and not the original codec?
- MP3 is the most compatible target. M4A (AAC) gives better quality at the same bitrate if your target device supports it.
- Is my video uploaded?
- No. ffmpeg.wasm runs in your browser, the file stays local.