Extract Audio from Video in Your Browser
Pull the audio track out of any video — losslessly when possible (M4A stream copy), with automatic MP3 fallback. Nothing is uploaded.
Extract the audio track from a video directly in your browser. When the source audio is AAC (most MP4/MOV files), MediaStand copies the stream bit-for-bit into an M4A file in seconds — no re-encoding, no quality loss. Other codecs are converted to MP3 automatically. Your file never leaves your device.
Choose a file or drop it here
🔒 Processed locally — never uploaded.
Most audio extractors re-encode everything to MP3 — burning time and quality even when the video already carries a perfectly good AAC track. This tool copies first: if your video's audio is AAC (the overwhelming majority of MP4 and MOV files), the track is extracted bit-for-bit into an M4A in seconds. Only when the source uses another codec does it fall back to a clean MP3 conversion, and the result badge tells you which path ran. Everything happens on your device.
How it works
- Pick a video from your device or drop it into the box.
- The tool tries a lossless stream copy first (AAC → M4A); if the audio codec can't be copied, it automatically converts to MP3 instead.
- Press the download button. The badge tells you whether you got a lossless M4A or a converted MP3.
Common uses
- Save the soundtrack of a lecture, meeting or webinar recording as an audio file.
- Turn a music performance video into an audio track for your library.
- Extract dialogue for transcription or subtitling workflows.
- Grab the audio of an interview before archiving or sharing it.
Supported formats and limits
| Input | MP4, MOV, WebM, MKV, AVI — any video with an audio track |
|---|---|
| Output | M4A (lossless AAC stream copy) when the source is AAC; MP3 (192 kbps) otherwise |
| Speed | Lossless copy: seconds, even for long videos. MP3 conversion: roughly the audio's own length or faster |
| Maximum file size | 500 MB (in-browser memory limit) |
| Where it runs | Entirely in your browser (WebAssembly) — keeps working offline once loaded |
Frequently asked questions
Is my video uploaded to extract the audio?
No. Extraction runs inside your browser using FFmpeg compiled to WebAssembly. Your file never leaves your device — you can even go offline after the page loads.
Why do I get an M4A file instead of MP3?
Because it is better: when your video already carries AAC audio, we copy it bit-for-bit — zero quality loss, finished in seconds. M4A plays everywhere MP3 does (phones, players, editors). If the source codec can't be copied, you get an MP3 automatically.
Does extracting reduce the audio quality?
On the lossless path, no — the AAC track is copied untouched. On the MP3 fallback the audio is re-encoded at 192 kbps, which is transparent for most content.
Which videos take the lossless path?
Anything with AAC audio — which covers nearly all MP4 and MOV files from phones, cameras and editors. WebM files (Opus/Vorbis audio) take the MP3 path.
Is there a size limit?
Videos up to 500 MB are supported. Because the lossless path is a stream copy, even long recordings finish in seconds once the engine is loaded.
Is this free?
Yes — free, no signup, no watermark, no queue. Processing happens on your device, so there is nothing for us to meter.