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WAV to MP3

Convert WAV recordings to MP3 files a fraction of the size. Free, with no upload.

Files stay on your device

Drop files to convert

See their format, then choose an output.

MP3, M4A, WAV, FLAC, and other audio, or a video with sound. You can also drag in a whole folder.

How to convert WAV to MP3

Open a WAV, or a whole folder of them, and save each one as an MP3 that's much smaller and plays everywhere. It's the usual step before emailing a recording, uploading a podcast, or putting songs on a phone. The WAV to MP3 converter runs in your browser, so nothing is uploaded.

  1. Step 1

    Choose your WAV files
    Pick one or many, or drop them into the converter above.

  2. Step 2

    Keep MP3
    MP3 is selected; choose another audio format if you need one.

  3. Step 3

    Download the MP3
    Save each file when it's converted.

What to expect

Supported inputs
WAV files at any sample rate, 16-bit, 24-bit, or 32-bit float, and any other audio or video file.
What happens
The uncompressed sound is encoded as MP3, usually about a tenth of the WAV's size. MP3 is selected first; you can choose another audio format.
Limits
MP3 holds two channels, so surround WAVs are mixed down to stereo. Very long recordings depend on your device's memory.

Private by design

Your video stays on your device

Mastershot processes your file locally in this browser. It does not need to be uploaded to a server, and you do not need an account to use the tool.

  • No upload
  • No signup
  • No watermark

Questions

A minute of CD-quality stereo WAV is about 10 MB. As MP3 it's about 1.2 MB.

MP3 leaves out detail most people can't hear. For editing or archiving, keep the WAV, or convert to FLAC, which is smaller and loses nothing.

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