WAV ↔ MP3 Converter

Convert WAV to MP3 (or MP3 to WAV) privately

Most online audio converters work by uploading your file to a server, converting it there, and letting you download the result. That's fine for a meme clip, but it's the wrong move for unreleased music, client work or anything private — your file now sits on someone else's machine. This converter never does that. It decodes your file with the Web Audio API and re-encodes it with a local MP3 encoder, all inside the browser tab, so the audio never leaves your device. No upload, no account, no watermark, no size quota beyond your own device's memory.

Use WAV → MP3 when you need a small, universally-playable file: 320 kbps is transparent for most ears, and 128 kbps is fine for quick sharing where size matters. Use MP3 → WAV when a tool or platform demands an uncompressed file — but remember the quality is set by the source. An MP3 already discarded audio data during its original encoding, so converting it back to WAV just gives you a larger file at the same fidelity; it can't rebuild what was lost. The one conversion that genuinely changes quality is a true WAV master down to MP3, which is why it's worth making sure that WAV is properly mastered first — loud, balanced and peak-safe — before you compress it. That's what TrackGleam's free mastering does, and it measures the result so you can verify it.