How to convert audio to WAV
- Drop the file on the box or press Choose a file. MP3, M4A/AAC, OGG/Opus, FLAC, WebM and the audio inside MP4, MOV or MKV video are accepted.
- Pick the WAV type: 16-bit PCM (CD quality, most compatible), 24-bit PCM, or 32-bit float.
- Tick Allow the ffmpeg fallback for rare formats only if the tool tells you the format needs it.
- Press Convert to WAV and download the file, which ends in
-audio.wav.
What it does and when to use it
WAV is the plain format almost every audio program reads. Convert to it when a video editor or DAW will not import an M4A, when a speech-recognition or analysis tool asks for PCM WAV, when you load samples into a hardware sampler or an older game engine, or when you will edit a file several times and do not want to compress it again after each save.
If you want a smaller file instead, the audio converter also writes M4A and Opus. To change the sample rate at the same time, use the sample rate converter; to keep only one channel, try mono to stereo. For the audio of a video, the video to audio tool is built for that job.
How it works
The file is decoded in a Web Worker on your device. WAV input is read directly. Other formats are opened by the Mediabunny library and decoded with your browser’s WebCodecs audio decoder into 32-bit floating-point samples. Those samples are written into a RIFF/WAVE file at the chosen bit depth, with the original sample rate and channel count. The summary names the source container and codec followed by “→ WAV”, and the result lists Sample rate, Channels, Length and File size.
Worked examples
From the tool’s output:
- A 10-second mono file at 44.1 kHz, 16-bit PCM: Sample rate 44,100 Hz, Channels 1, File size 861.4 KB.
- A 10-second stereo file at 48 kHz, 24-bit PCM: Sample rate 48,000 Hz, Channels 2, File size 2.7 MB.
WAV size is simply sample rate × channels × bytes per sample × seconds:
| WAV type | 44.1 kHz stereo, per minute | 48 kHz stereo, per minute |
|---|---|---|
| 16-bit PCM | 10.1 MB | 11 MB |
| 24-bit PCM | 15.1 MB | 16.5 MB |
| 32-bit float | 20.2 MB | 22 MB |
Limits and tips
- Without WebCodecs (older browsers), only WAV input works. Current Chrome, Edge, Firefox and Safari 26+ support it.
- The file is decoded fully in memory, so a long concert recording may fail on a phone.
- Tags such as title and artist are not copied into the WAV.
Frequently asked questions
Does converting MP3 to WAV improve the quality?
Which WAV type should I choose?
Why is the WAV so much bigger than my MP3?
Does it change the sample rate?
Do I need the ffmpeg option?
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