Video to Audio: Extract MP3 or WAV in Your Browser
Extract the audio track from any video file and download it as MP3 or WAV, using ffmpeg.wasm.
Upload a video, choose MP3 or WAV, and click Extract audio. The entire conversion runs inside your browser via ffmpeg.wasm, the WebAssembly build of FFmpeg. No server receives your file and no account is required. MP3 is encoded at 192 kbps using libmp3lame; WAV is uncompressed PCM for lossless quality. The result plays in an inline audio player before you download.
Video to Audio uses ffmpeg.wasm to read the audio stream from a video container and encode it into a standalone audio file without re-encoding the video picture. For MP3 output, FFmpeg decodes the source audio and encodes it with libmp3lame at 192 kbps, which is a reasonable balance between file size and audible quality for most content. For WAV output, the audio is decoded and written as 16-bit PCM, producing a lossless file that is larger but suitable for further editing in a DAW or audio editor.
If the source video has no audio stream, FFmpeg will produce an empty output file. The tool detects this and shows a clear message rather than offering a broken download. This is the most common reason extraction fails on screen recordings or silent video loops.
The ffmpeg.wasm core is about 30 MB and is loaded on demand the first time you click Extract audio. The browser caches it so subsequent extractions in the same session start immediately. Progress is tracked via FFmpeg's progress event and displayed inline. All processing stays local; no bytes leave your device.
- 1
Upload a video
Click Choose file and pick an MP4, MOV, WebM, MKV, or AVI. A preview plays inline so you can confirm you have the right file.
- 2
Choose a format
Select MP3 for a compressed file at 192 kbps, or WAV for uncompressed 16-bit PCM. Your choice is saved for next time.
- 3
Extract and download
Click Extract audio. FFmpeg.wasm processes the file locally and shows an audio preview. Click Download to save the result.
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Verify audio content before trimming
Extract and preview the audio track first to check sync and quality before spending time on further video editing.
Is my video uploaded to a server?
No. The file is processed entirely by ffmpeg.wasm running in your browser tab. Nothing is sent to any server.
What is the difference between MP3 and WAV output?
MP3 compresses the audio using lossy encoding at 192 kbps, making the file smaller. WAV stores uncompressed PCM audio, which is lossless and better for editing but results in a larger file.
Why does the first extraction take longer?
FFmpeg.wasm is roughly 30 MB. It downloads once on first use and is cached by the browser, so later extractions in the same session start without a wait.
What happens if the video has no audio?
FFmpeg produces an empty output file and the tool shows a message: 'This video has no audio track to extract.' Silent video loops and some screen recordings have no audio stream.
Which video formats work?
MP4, MOV, WebM, MKV, and AVI are accepted. Compatibility depends on the demuxers compiled into the WASM build. MP4 with H.264 or H.265 and AAC audio is the safest combination.