MP4 to WAV, uncompressed.
Pull the sound out of a video as a 16-bit WAV that every audio editor opens. On your device, nothing uploaded.
How do I convert MP4 to WAV for free?
Drop the video into Cutmallow's free converter above with WAV selected. Your browser decodes the soundtrack and writes it as an uncompressed 16-bit PCM WAV at the video's own sample rate (usually 44.1 or 48 kHz), ready for Audacity, GarageBand, Premiere or DaVinci Resolve. Nothing is uploaded, there's no watermark and no length limit.
Updated
- Output
- WAV
- Bit depth
- 16-bit PCM
- Sample rate
- As recorded
- Length limit
- None
How to use it
Keep WAV selected (or switch to MP3 for a small file).
Drop a video, or tap to pick one.
Save the WAV when it is ready.
How it works
A video holds its picture and its sound as separate streams. The converter reads only the sound packets, a piece at a time, so a long video never has to fit in memory, and the picture is never touched.
The compressed sound (usually AAC in an MP4) is decoded by your browser’s built-in audio decoder into raw samples and written as 16-bit PCM into a WAV file. The decode is the only processing step, so the WAV is the exact sound your browser plays for that video, with no second round of compression.
It runs on Mediabunny, an open-source media library, in a background thread of the page. Your video never leaves your device.
Tips for a better result
- Editing a podcast or voice-over? WAV avoids a second round of MP3 compression.
- Sharing or listening only? Pick MP3: the file is about eight times smaller.
- WAV cannot make the sound better than the video’s own track. Clean noise first if needed.
Turn it into a Short
Cutmallow's free editor finishes the job. After converting, tap Edit in Cutmallow and the video opens there, still on your device.
- Cuts the pauses and filler words
- Writes animated word-by-word captions
- Exports a 9:16 MP4 for Shorts, Reels and TikTok
Frequently asked questions
Something else? Write to hello@cutmallow.com.
Is a WAV better quality than the MP4’s sound?
It is the same sound, stored without compression. The MP4’s AAC sound is decoded once and saved as 16-bit PCM, so editing and re-exporting it does not add another round of compression. It cannot add detail the original track did not have.
What sample rate and bit depth is the WAV?
16-bit PCM at the video’s own sample rate, usually 48 kHz for phone and camera videos or 44.1 kHz for music videos, with the same number of channels (mono stays mono).
Can I convert MP4 to WAV on iPhone?
Yes, in Safari on iOS 26 or later. Tap the drop box, pick the video from Photos and tap Save WAV: the share sheet offers Save to Files. On older iOS pick Original sound, which needs no decoding.
Is my video uploaded anywhere?
No. Your video never leaves your device. The file is opened and processed by your own browser, and the result is saved straight from your device.
Is there a file size or length limit?
No. The file is read from your device a piece at a time and the result is written to the browser’s private storage, so long and very large videos work. The only limit is free space on your device.