How to use the MP4 to WAV tool
- Choose the video that contains the audio.
- Pick the audio format and bitrate. Optionally set a start and end to keep only part of it.
- Press Extract audio.
- Listen to the preview and download the file.
About this tool
WAV stores uncompressed audio (PCM). Files are large, roughly 10 MB per minute for CD-quality stereo, but nothing is lost, which is what audio editors, sample libraries and mastering workflows want.
MP4 files nearly always hold AAC audio. The tool reads it directly, and when the source is AAC and you choose an AAC-family format it is copied without re-encoding.
Why use ToolsCrow for this
- Lossless output. Uncompressed PCM for editing.
- Extract a segment. Start and end sliders.
- Mono option. Smaller files for speech.
- Private. No upload.
Good to know
- Videos with no audio track cannot be converted.
Frequently asked questions
Is my video uploaded to a server?
No. Everything runs inside your browser tab using your own device's video hardware. Your file is never sent to ToolsCrow or anyone else, which also means there is no waiting for an upload and it keeps working if your connection drops after the page has loaded.
Is it really free? Is there a watermark?
It is free with no sign-up, no watermark and no daily limits. The only limits are the ones your device sets: memory and processing power.
How large a video can I use?
Because the video is processed on your device, the limit is your device's memory rather than a server quota. Phone clips of several hundred MB are fine on most devices, and desktop computers usually handle 1 to 2 GB. Files over about 4 GB are not supported.
Which browsers work best?
Current Chrome, Edge and Safari (16.4 or newer, including iPhone and iPad) work best because they include the WebCodecs video engine. Recent Firefox versions work for many files. Older browsers fall back to a much slower real-time mode or may not work at all.
Does converting MP4 to WAV reduce quality?
The audio is decoded to uncompressed WAV, so nothing more is lost, but it cannot recover detail that the original compression threw away.
Can I extract only part of the audio?
Yes. Use the start and end sliders under "Extract only a part".
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