Turn a compressed MP3 into an uncompressed WAV file — useful for editing in other software that expects WAV.
The MP3 to WAV converter turns MP3 audio (MPEG-1/2 Layer III) into WAV (Waveform Audio File Format (RIFF, usually uncompressed PCM)) directly in your browser. WAV is what DAWs, video editors, samplers and broadcast tools expect, and it opens instantly without decoder quirks.
MP3 is the most universally supported lossy format; plays on virtually every phone, car stereo, browser and editor. WAV is the editing and archiving standard — uncompressed, sample-accurate and supported by every audio application. Because MP3 is already lossy, converting to WAV keeps the audio exactly as it sounds now but cannot restore detail that was removed when the MP3 was made — expect a much larger file with the same quality.
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 WAV 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 10 MB per minute for 16-bit 44.1 kHz stereo.
Source format facts: MP3 files are lossy; usual bandwidth: typically low-passed at 16–20 kHz depending on bitrate. Target facts: WAV is lossless; usual bandwidth: full bandwidth up to the Nyquist limit.
Import MP3s as WAV for sample-accurate editing.
Many editors prefer uncompressed audio.
Audio CDs need 16-bit 44.1 kHz PCM.
Process without decoder differences.
| From | MP3 — MPEG-1/2 Layer III |
|---|---|
| To | WAV — Waveform Audio File Format (RIFF, usually uncompressed PCM) |
| Direction | lossy → lossless |
| Typical size | about 10 MB per minute for 16-bit 44.1 kHz stereo |
| Tags | MP3: ID3 → WAV: RIFF/INFO |
No. It is identical in sound but easier to edit.
It stores every sample uncompressed (about 10 MB per minute for stereo CD quality).
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.
Be the first to share your experience with this tool — your feedback helps others.