WAV to MP3 Converter
Compress bulky WAV files to MP3 at 128–320 kbps right in your browser. Free, private, no signup — nothing is uploaded.
About the WAV to MP3 Converter
This free WAV to MP3 converter shrinks large uncompressed WAV files into small, shareable MP3s. You choose the bitrate from 128 to 320 kbps, and the tool shows exactly how much smaller the MP3 is compared with the original WAV.
All processing happens in your browser using FFmpeg WebAssembly — your file is never uploaded. The converter engine (about 30 MB) downloads from a CDN the first time you use it and is then reused, so the first conversion is the slow one and the rest are fast.
MP3 is a lossy format, so encoding discards some data to save space; at 256–320 kbps the difference is hard to hear for most listeners. WAV files up to 100 MB are supported, which comfortably covers most single songs and voice recordings.
How to Use the WAV to MP3 Converter
- 1Choose a WAV file, up to 100 MB.
- 2Pick the MP3 bitrate — 192 kbps is balanced, 320 kbps for best quality.
- 3Click Convert to MP3 and wait for the progress bar.
- 4Check the size saving, preview the audio, and download your MP3.
Frequently Asked Questions
Is my audio uploaded to a server?
No. The WAV is converted in your browser with FFmpeg WebAssembly and never leaves your device. Only the converter engine is downloaded, once.
Why is the first conversion slow?
The first run downloads the FFmpeg core (~30 MB) from a CDN and compiles it in your browser. It is cached afterwards, so later conversions are much faster.
How much smaller will the MP3 be?
Usually far smaller — WAV is uncompressed, so a 30 MB WAV might become a 3–5 MB MP3 at 192 kbps. The tool shows the exact percentage saved after converting.
Will I lose audio quality?
MP3 is lossy, so some data is discarded to save space. At 256–320 kbps most people cannot hear the difference; lower bitrates are smaller but audibly softer on detail.
Is there a size limit?
Yes, 100 MB per WAV. Since everything runs in your browser's memory, very large files can be slow — trim long recordings first if you hit the limit.