1
Choose the MP4
Drop the MP4 on the box above, or tap it to pick a video. Nothing is uploaded.
Convert MP4 to WAV for Free
Convert MP4 to WAV for editing, with the sound decoded on your device and nothing uploaded.
Last updated
- Free, no sign-up
- Never leaves your device
- Works on your phone
How do I check the WAV before I save it?
To convert MP4 to WAV for free, choose the MP4 above, keep WAV selected, and select Extract audio. The browser decodes the sound to an uncompressed WAV, with no upload. Play it on this page before you download it.
Play it here first
A player appears under the download button. Check the start and the end line up with the video.
Same length as the video
The WAV starts at 00:00 and runs the whole clip, so it drops onto a timeline in sync.
Why convert MP4 to WAV?
An MP4 stores its sound compressed, usually as AAC. Editors, transcription tools, and audio software often want the uncompressed WAV instead.
Edit the sound in a DAW
Audacity, Audition, and Logic work best on WAV. Each edit stays lossless until the final export.
Feed a transcription or speech tool
Many speech-to-text and analysis tools ask for WAV, often at 16 or 48 kHz.
Sync audio in a video editor
A WAV of the camera sound lines up with a separate recorder clip for multicam sync.
Clean the soundtrack
Remove wind or hum from the WAV, then put the cleaned sound back under the picture.
Remove background noise from videoHow big is the WAV from an MP4?
The WAV is uncompressed, so its size depends only on length, sample rate, and channels, not on the video.
| Length | Stereo WAV, 48 kHz | AAC in the MP4, typical |
|---|---|---|
| 1 minute | About 11 MB | About 1 MB |
| 10 minutes | About 115 MB | About 10 MB |
| 60 minutes | About 690 MB | About 60 MB |
Why use EraseNoise to convert MP4 to WAV?
It decodes the MP4’s sound and writes a plain WAV every editor opens, and nothing else.
Nothing is uploaded
The video stays on your device. Only its sound is read, in your browser.
A plain PCM WAV
The WAV keeps the MP4’s sample rate and channels, so Premiere, DaVinci Resolve, Audacity, and Pro Tools open it as it is.
Large videos are fine
The picture is skipped, so a 4K MP4 up to 2 GB converts without loading the video into memory.
Free with no account
No sign-up, no watermark, and no daily cap.
Why is it faster than uploading the MP4?
Upload converters send the whole video and then send back a WAV ten times the size of its sound. Here neither trip happens.
No upload wait
A long MP4 can take longer to upload than to convert. Converting MP4 to WAV here starts immediately.
Works on a phone
Pick the video from your camera roll in Safari or Chrome and save the WAV to Files.
No editor to open
No project or export dialog to get the sound out of one clip.
Which MP4 files can I convert to WAV?
Convert MP4 to WAV for videos up to 2 GB. The WAV can be up to 60 minutes long.
MP4 and M4V
Phone, camera, screen recorder, and editor exports. The MP4 needs a sound track.
MOV and WebM too
The same box takes iPhone MOV files and browser WebM recordings.
Up to 60 minutes of WAV
The WAV is built in your browser’s memory, so one file can be up to an hour. For longer videos, choose MP3 or M4A.
Files you are allowed to use
This page converts files on your device. It does not download from YouTube or other sites.
How to convert MP4 to WAV
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Keep WAV selected
WAV is picked for you. Choose MP3 or M4A for a smaller file.
- 3
Extract and download
Select Extract audio, play the WAV, and download it.
Who converts MP4 to WAV?
A video editor fixing the sound
Convert MP4 to WAV, clean and level it in a DAW, and lay it back under the picture at 00:00.
A researcher transcribing interviews
Recorded calls arrive as MP4. A WAV goes straight into the transcription or analysis tool.
A musician sampling a clip
Take the sound of a video you shot as WAV and load it into a sampler or a DAW.
What to do after you convert MP4 to WAV
If the soundtrack needs work, these pages finish the job.
| Job | Use |
|---|---|
| Wind, fan, traffic, or hum under the voice | Remove background noise from audio |
| Clean the sound and keep the video in one step | Remove background noise from video |
| The level is too quiet or uneven | Normalize audio (free, in the browser) |
| A smaller file for listening | Convert video to MP3 (free) |
Is my MP4 uploaded?
No. To convert MP4 to WAV, EraseNoise reads the file in your browser and writes the WAV there too. No copy is sent to a server or stored. Refreshing the page clears the result, so download it before you leave.
Frequently asked questions
How do I convert MP4 to WAV for free?
Open this page, choose the MP4, keep WAV selected, and select Extract audio. Your browser does the work, so it is free, needs no account, and adds no watermark.
What sample rate is the WAV?
The same as the MP4’s sound, usually 44.1 or 48 kHz, with the same channels. Nothing is resampled, and the WAV starts at 00:00.
Does converting MP4 to WAV improve the sound?
No. The WAV sounds exactly like the AAC in the MP4. It is bigger because it is uncompressed, and it stops further loss while you edit.
Is my video uploaded?
No. The MP4 is read and the WAV is written in your browser. Nothing is sent to EraseNoise or anyone else.
How long can the video be?
The MP4 can be up to 2 GB, and the WAV up to 60 minutes, because it is built in memory. Choose MP3 or M4A for longer videos.
Will the WAV stay in sync with the video?
Yes. It starts at the first frame and runs the full length of the clip, so placing it at 00:00 on the timeline lines it up.
Convert MP4 to WAV on this device
Choose one MP4. Play the WAV before you save it, and nothing leaves your phone or computer.
Choose an MP4