PocketPlay
中文
Extract Audio from Video
Pull the soundtrack out of an MP4, MOV or WebM file and save it as WAV or MP3, entirely in your browser.
Source
Export audio
WAV is uncompressed 16-bit PCM — perfect quality, but roughly 10 MB per minute of stereo audio.
MP3 is encoded in this tab with LAME. 192 kbps is a good default; 320 kbps is near-transparent.
Extracted audio
How to extract audio from a video
- Drop an MP4, MOV, WebM or MKV file onto the box — it is decoded on your own machine.
- Choose WAV for a lossless copy, or MP3 and a bitrate for a small file.
- Click Extract audio, listen to the preview, then download.
FAQ
Does the audio lose quality?
WAV is a bit-exact copy of what the decoder produced, so there is no further loss. MP3 re-compresses, which is always lossy — the original track inside an MP4 is already compressed, so pick 192 kbps or higher to avoid stacking two rounds of artefacts.
Why is it slow on some files?
Most containers decode instantly. If the browser cannot decode the file in one go, the tool falls back to playing it through once and recording the output, which takes as long as the video itself. That fallback is rare and only affects unusual codecs.
Is my video uploaded?
No. Decoding and encoding both happen inside this page using the Web Audio API and a WebAssembly build of LAME. The file never leaves your device and nothing is stored.