Convert WAV to MP3, Free
Files convert instantly in your browser. 100% private, any file size, no account needed.
Drop your WAV file here
or click to browse. Any file size.
Conversion runs entirely in your browser. Your file never leaves your device.
How to convert WAV to MP3
WAV files store uncompressed PCM audio at full quality, which makes them large: a 4-minute song at 44,100 Hz and 16-bit stereo is about 40 MB. MP3 at 128 kbps compresses that to roughly 4 MB at a quality level that most listeners cannot distinguish from the original in casual listening. Converting WAV to MP3 is the standard approach when you need to share audio files, add music to a phone, or reduce storage requirements while keeping the audio usable.
This converter encodes your WAV file as MP3 directly in your browser using WebAssembly. No audio is sent to a server. You choose the bitrate, and the LAME-based encoder handles the compression. The original WAV file is not modified; the MP3 is a new file you download separately.
Upload the WAV file
Drop your .wav file onto the converter. WAV files are often large, but since processing is local there is no upload size limit. Even a 500 MB multi-channel broadcast WAV works.
Choose the bitrate
320 kbps: highest quality, 7.5 MB per minute of audio. 192 kbps: transparent quality for most music, 4.5 MB per minute. 128 kbps: practical for voice, podcasts, background music, 2.4 MB per minute. 64 kbps: acceptable for speech-only recordings, 1.1 MB per minute.
Convert in browser
The WebAssembly MP3 encoder reads the WAV samples and compresses them. A four-minute file at 192 kbps typically converts in 10 to 15 seconds on modern hardware.
Download the MP3
Click download. Compare the file size reduction: your 40 MB WAV becomes 4 to 10 MB depending on the bitrate. Keep the WAV as your archive if storage allows.
Frequently asked questions
What is the best bitrate for music converted from WAV?
192 kbps is the point where most listeners in double-blind tests cannot reliably tell the difference between the MP3 and the original WAV. 320 kbps provides a larger safety margin for golden-ear listeners. Below 128 kbps, artifacts are audible on complex musical passages with cymbals and sustained strings.
Does the MP3 encoder modify the WAV file?
No. The converter reads the WAV file as input and produces a separate MP3 output file. The original WAV is not modified.
Is the WAV file uploaded to a server?
No. The encoding runs entirely inside your browser using WebAssembly. Your audio never leaves your device.
Should I keep the WAV after converting to MP3?
Yes, if you have storage space. The WAV is a lossless master copy. If you later want a higher bitrate MP3, a podcast-quality lower bitrate version, or to convert to a different format, you can re-encode from the WAV without any additional quality loss. Converting from an existing MP3 to a new MP3 degrades quality further.
What is the difference between joint stereo and stereo MP3?
Stereo MP3 encodes left and right channels independently. Joint stereo stores only the sum (mid) and difference (side) between channels, allocating bits more efficiently. At 128 kbps and above, joint stereo typically produces better quality for the same file size. Most encoders use joint stereo by default.