Shrink a large WAV recording down to a compressed, shareable MP3 file.
The WAV to MP3 converter turns WAV audio (Waveform Audio File Format (RIFF, usually uncompressed PCM)) into MP3 (MPEG-1/2 Layer III) directly in your browser. MP3 is small enough to email, upload or stream and plays everywhere — the practical format for sharing.
WAV is the editing and archiving standard — uncompressed, sample-accurate and supported by every audio application. MP3 is the most universally supported lossy format; plays on virtually every phone, car stereo, browser and editor. Going from WAV to MP3 discards some audio information to save space. Choose a high bitrate (192–320 kbps for music, 96–128 kbps for speech) to keep the result close to the original.
Your file is decoded to 32-bit floating-point samples by the browser’s own audio decoder — and at the file’s own sample rate, not a resampled one. You can optionally resample or switch channels. It is then encoded to MP3 on your device; for a lossy target the result is decoded again for the preview, so you hear what you will get. Typical size: about 1 MB per minute at 128 kbps, 2.4 MB at 320 kbps.
Source format facts: WAV files are lossless; usual bandwidth: full bandwidth up to the Nyquist limit. Target facts: MP3 is lossy; usual bandwidth: typically low-passed at 16–20 kHz depending on bitrate.
Make WAV recordings small enough to send.
Export masters to 64–128 kbps MP3.
Universal compatibility.
Save space on cloud drives.
| From | WAV — Waveform Audio File Format (RIFF, usually uncompressed PCM) |
|---|---|
| To | MP3 — MPEG-1/2 Layer III |
| Direction | lossless → lossy |
| Typical size | about 1 MB per minute at 128 kbps, 2.4 MB at 320 kbps |
| Tags | WAV: RIFF/INFO → MP3: ID3 |
128 kbps speech, 192 kbps music, 320 kbps maximum quality.
Yes, it never leaves your device.
Going to WAV is lossless. Going to MP3 uses a standard 192kbps encode by default (adjustable), which is transparent for most listening but is a lossy step if your source was uncompressed.
No — the file is decoded and re-encoded entirely in your browser using the Web Audio API and, for MP3, a small bundled encoder. Nothing is sent anywhere.
This tool runs entirely in your browser using the Web Audio API. Nothing is uploaded, stored or shared — there is no server to send your file to, so it works offline once the page has loaded.
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