MP4 to WAV Converter
Convert MP4 to WAV free — no upload, no signup
To convert MP4 to WAV, drop your MP4 video into the box below and click Convert. Fylo converts with ffmpeg running inside your browser, so nothing is uploaded and there's no signup or watermark. Get uncompressed WAV audio from MP4 for editing and transcription.
Drop audio files here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
WAV is lossless — no bitrate to choose. Sample rate and channels are under Advanced.
Advanced
How to convert MP4 to WAV
Add your MP4 videos
Drag and drop MP4 files into the box or tap to choose them. The converter engine (about 31 MB) downloads once, the first time you convert.
Check the settings
WAV is lossless, so there's no bitrate to pick. Change sample rate or switch to mono under Advanced if a device needs it.
Convert and download
Click Convert, then download each WAV file or all of them as one ZIP.
Why convert MP4 to WAV?
Audio editors, transcription services, video editors' audio tools and speech-to-text engines often want WAV input rather than a video file.
What happens when you convert MP4 to WAV?
Fylo decodes the MP4's audio to 16-bit PCM WAV at its original sample rate — about 10 MB per minute of stereo. Choose mono and 16 kHz under Advanced for speech recognition tools.
How does Fylo convert MP4 to WAV?
Fylo decodes the soundtrack of the MP4 (usually AAC) with ffmpeg compiled to WebAssembly and encodes it with 16-bit little-endian PCM with no compression. The video stream is skipped entirely, which is why extraction is fast — the WAV is a fraction of the video's size. The original sample rate and channel layout are kept unless you change them under Advanced.
What's the difference between MP4 and WAV?
MP4 (MPEG-4 Part 14) is a container format standardised in 2001 and based on Apple's QuickTime file structure. A container holds separately compressed video and audio streams plus metadata such as subtitles, chapters and cover art. Most MP4s use H.264 video and AAC audio; newer files may use H.265 (HEVC) or AV1.
WAV was introduced by Microsoft and IBM in 1991 and, like AVI, uses the RIFF container. Most WAVs hold uncompressed PCM audio: CD quality (44.1 kHz, 16-bit, stereo) runs at 1,411 kbps, or about 10.6 MB per minute.
Learn more: MP4 format guide · WAV format guide
| Property | MP4 | WAV |
|---|---|---|
| Type | Video | Audio |
| Contains | Video (H.264, H.265/HEVC, AV1) + audio (AAC, MP3) | Audio only, none (pcm) |
| Developed by | MPEG (ISO/IEC 14496-14) | Microsoft and IBM |
| Introduced | 2001 | 1991 |
| Compatibility | Universal: phones, TVs, editors, social media | Universal on computers; editors and DAWs |
| Best for | Sharing, uploading, streaming, editing | Recording, editing, mastering |
Frequently asked questions
Which settings for transcription?
Mono, 16 kHz WAV is a common requirement for speech-to-text services.
Is the WAV higher quality than the MP4 audio?
It's a lossless copy of the decoded AAC — no better, but no further loss.
Is my MP4 file uploaded to a server?
No. Fylo runs ffmpeg, the same engine used by professional video tools, compiled to WebAssembly inside your browser. Your MP4 file is read directly from your device and never sent anywhere.
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