Batch MP4 to WAV Converter
Convert MP4 to WAV online for free. 100% secure, fast, and private local file conversion directly in your browser. No software installation required.
Why convert MP4 to WAV?
Sometimes extracting audio from video is not enough: you need it lossless. Video editors cutting sound effects out of footage, sound designers sampling from games or films, podcast producers editing interviews frame-accurately, and musicians transcribing from video all convert MP4 to WAV because uncompressed PCM edits cleanly and survives repeated processing passes without degrading. WAV also gives a fixed, predictable sample rate that DAWs and video editors handle without resampling surprises.
WasmConvert extracts the audio track from your MP4 and writes it as uncompressed WAV PCM entirely on your device: the video never leaves your computer, so unreleased footage or licensed material is not uploaded. The output is a standard WAV, CD-compatible 44.1 kHz 16-bit stereo by default, that drops straight into any editor. No upload limits and batch conversion handle a whole folder at once. Remember the trade-off: WAV is huge, about 10 MB per minute, but it is a true lossless capture of the source audio.
Common use cases
- Editing dialogue, interviews, or sound effects from video with sample-level precision
- Building sound-design or music libraries from video sources without lossy generation loss
- Supplying fixed-rate PCM WAV to DAWs, video editors, and game engines
How to convert MP4 to WAV (Step-by-step)
Select or drop your file
Click "Choose Files" or drag and drop your MP4 file directly onto this page.
Set target format
Make sure the output format is set to WAV.
Local conversion
Click convert. Your file is processed entirely in your browser memory - no data is uploaded to our servers.
Save instantly
Once finished, your WAV file is ready to download.
MP4 is the most widely supported digital multimedia container format. It is universally compatible with all web browsers, smartphones, and media players.
WAV is an uncompressed, lossless audio format. It is preferred for professional audio editing, though files are significantly larger than MP3s.
Pro tips for MP4 to WAV conversion
- WAV output is uncompressed: expect about 10 MB per minute at 44.1 kHz 16-bit stereo, so plan disk space for longer clips
- The WAV is only as good as the MP4's audio track: if the video's audio is low-bitrate AAC, WAV preserves it faithfully but cannot restore what was already discarded
- For delivery rather than editing, MP3 is usually the better final format: use WAV as your working file, then export MP3 when sharing