MP4 → WAV · Free · No Upload
Free Online MP4 to WAV Converter — No Installation
Convert MP4 (MPEG-4) to WAV (PCM) right in your browser, in seconds. Free, unlimited, and private: your file never leaves your device.
100% local processing: your file never leaves your device. Once the engine is ready, this tab can keep converting offline. Reopening or reloading offline may not work.
Supported formats:Files .mp4/.m4v up to 500 MB — processed locally · Video and virtually any audio format are also accepted — we extract the audio automatically.
How it works
- 01
Upload the MP4 video
Drag the .mp4/.m4v file to the area above or click to select. Files up to 500 MB are accepted — everything is processed locally.
- 02
The conversion runs in your browser
FFmpeg (the same engine used by professionals) runs in WebAssembly right on the page: the audio track is extracted from the video without sending any bytes to servers.
- 03
Download the WAV
In seconds, the .wav file is ready for download, in standard 16-bit PCM, ready for any audio editor.
Frequently asked questions
Why convert MP4 to WAV?
Many people only need the AUDIO from a video — to listen offline, edit in an audio app, or transcribe. Extracting MP3/WAV cuts the size by ~10× and unlocks the content. WAV is the WORKING format: lossless editing, accepted by every audio software, and what telephony/IVR systems usually require (8 kHz mono WAV).
Where do MP4 files come from?
Typically from phone cameras (Android and iPhone), recordings of classes, live streams, and meetings (Zoom, Meet, Teams) and course and video downloads. MP4 container with separate video and audio tracks; audio extraction doesn't re-render the video (fast and without extra loss).
Is it worth using WAV?
WAV is the WORKING format: lossless editing, accepted by every audio software, and what telephony/IVR systems usually require (8 kHz mono WAV). Microsoft/IBM RIFF container (1991); 16-bit/44.1 kHz stereo is 10.1 MB/min; RIFF has a 4 GB ceiling — longer recordings use W64 or RF64.
Do I lose quality when converting MP4 to WAV?
There is no additional loss: the WAV preserves exactly what exists in the MP4 file. Keep in mind that the original quality of the MP4 (which is already compressed) is the ceiling — converting to a lossless format does not "recover" quality.
What if I need a transcript of this audio?
After converting, you can transcribe the file with AI on VoxScriber: 30 free minutes per month, with automatic punctuation and speaker identification. Ideal for WhatsApp audio messages, meetings, and interviews.
Is my file sent to any server?
No. All processing is local (FFmpeg compiled to WebAssembly running on the page). The file never leaves your device—it even works offline after the page loads.
Is there a size or quantity limit?
The limit is 500 MB per file (browser memory). There is no limit on the number of uses. For larger files, VoxScriber processes them on the server with uploads up to 5 GB.
Need the text from this audio? Transcribe with AI — 30 min free
Create free account →30 minutes/month free. No credit card required.
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