MP4 to WAV Converter
Fixpio’s mp4 to wav converter lifts the sound out of an MP4 and saves it as uncompressed WAV that any editor opens. Add the file, press convert, and download the audio — decoded on your device, never uploaded.
Convert MP4 to WAV
Add an MP4 file below and download its audio back as a WAV.
Drop your MP4 file here
or choose a file stored on this device
Works with MP4 files. The sound track is decoded and saved as a standard WAV holding uncompressed 16-bit PCM audio — the picture is not kept.
Why use this MP4 to WAV converter?
Built for pulling clean, editable audio out of video files.
Audio out of any MP4
Interviews, lectures, screen recordings and clips: if it is an MP4 with sound, this lifts the sound out as a clean, editable WAV.
Ready for editing
WAV is the working format of audio production. Trim it, clean it, mix it — no generational loss from re-saving a compressed file.
No software to install
No desktop converter, no plug-in, no account. The conversion runs in the tab you already have open, on Windows, Mac or a phone.
About the MP4 to WAV converter
This mp4 to wav converter takes the sound inside an MP4 file and saves it as a WAV. Most people arrive here with a video — an interview, a lecture, a meeting recording, a clip — and a job that only needs the audio: editing it, transcribing from a clean copy, dropping it into a podcast or a presentation. Adding your MP4 above decodes its audio track right here in your browser and writes it out as standard, uncompressed WAV.
WAV is the safe, boring, universal choice, and that is its strength. As 16-bit PCM it holds the decoded audio exactly, in the format that Audacity, every digital audio workstation and every video editor accepts without conversion arguments. Where an MP3 would compress the sound a second time and keep the scars, the WAV keeps the working material intact, ready to trim, clean and mix.
Two honest consequences follow. First, only the sound is converted — the picture part of a video is read past and left behind, so the download is an audio file, not a smaller video. Second, uncompressed audio is heavy: expect the WAV to be far larger than the MP4’s sound track, roughly ten megabytes per minute for CD-rate stereo. That size is the normal price of an editing-grade file, and it is why there are no settings on this page — the format is fixed, so there is nothing to configure.
The decoding itself is done by your own browser, which handles the AAC audio found in standard MP4 files. An unusual file — a silent video, or one encoded with an exotic codec — cannot be decoded, and the page will tell you so plainly instead of handing back a broken file.
People use this converter to pull interview audio out of camera files, to rescue the sound from screen recordings, to prepare narration tracks for editing, and to turn MP4 audio downloads into something their software opens. Whatever the job, it happens entirely on your device: nothing is uploaded, nothing is stored, and there is nothing to sign up for.
Frequently asked questions
The questions people ask when they need the sound out of an MP4.
How do I convert MP4 to WAV?
Add your .mp4 file with the button above (or drag it into the box), then press Convert to WAV and download the result. Your browser decodes the file’s audio and writes it as a WAV, all on your own device — nothing is uploaded and no software needs installing.
Does this take the audio from a video MP4?
Yes — that is its main job. The converter decodes the sound track of the MP4 and saves that as a WAV file. The picture is not kept: the download is audio only, which is what you want for editing, transcription prep or reuse in another project.
What quality is the WAV it produces?
The output is uncompressed 16-bit PCM WAV, written at the sample rate your browser decodes from the source — the same working format audio editors use. It holds the decoded sound exactly; it cannot add back detail that the MP4’s own compression already removed, but it loses nothing further.
Why is the WAV file so much bigger than the MP4?
Because WAV is uncompressed. The sound inside an MP4 is stored in a compact form (usually AAC); writing it as raw PCM takes roughly ten megabytes per minute of stereo audio. That size is normal for an editing-grade file — if you need a small file for sharing instead, an MP3 converter is the better tool.
Can I convert an MP4 that has no sound?
There would be nothing to convert — an MP4 without an audio track has no sound to write into a WAV. If your file should have sound but the conversion fails, check that it plays with audio elsewhere and that it is a standard MP4; very unusual codecs cannot be decoded by the browser, and the page will say so.
Is this MP4 to WAV converter free, and is my file uploaded?
It is completely free, with no sign-up and no usage limits. Your file is never uploaded: the decoding and WAV writing happen locally in your browser, on your own device, and nothing is sent to or stored on a server.