Turn a big lossless WAV into a small, shareable MP3 in your browser. Choose 128–320 kbps and download in seconds. Nothing is uploaded.
WAV is uncompressed PCM — pristine, but enormous, at roughly 10 MB per stereo minute. That's perfect for editing and archiving and terrible for emailing, uploading, or fitting a playlist on a phone. Converting WAV to MP3 typically shrinks the file about ten-fold, which is the whole point: a three-minute song drops from ~30 MB to ~4 MB at 192 kbps.
The conversion is one-way and lossy — MP3 throws away data it judges inaudible to hit that size — so keep the original WAV as your master and treat the MP3 as a distribution copy. At 320 kbps the difference is transparent to almost everyone; drop to 128 kbps only when small size matters more than fidelity. Runs entirely on your device. Going the other way for editing? Use MP3 to WAV, or see the best formats for editing.
Roughly ten times smaller at a typical 192 kbps. WAV is uncompressed PCM at about 10 MB per stereo minute, so a three-minute song is around 30 MB; the same song as a 192 kbps MP3 is about 4 MB. A 320 kbps MP3 is a bit larger but still a fraction of the WAV. The exact size is shown before you download, and it scales directly with the bitrate you pick.
For music, 320 kbps is effectively transparent — almost nobody can distinguish it from the WAV — and 192 kbps is a good balance of size and quality for general listening. Drop to 128 kbps only when small file size matters more than fidelity, since that's where artifacts start to show in cymbals and reverb tails. For spoken word you can go lower still. When in doubt, 320 kbps is the safe pick.
No — converting WAV to MP3 is one-way and lossy. MP3 permanently discards data it judges inaudible, and converting the MP3 back to WAV only unpacks that already-reduced audio into a bigger file; it can't rebuild what was removed. So keep your original WAV as the master for any future editing, and treat the MP3 as a distribution copy for sharing and playback.
Yes, 100 MB, because the whole file is decoded into memory before encoding. That covers about 10 minutes of CD-quality WAV (16-bit, 44.1 kHz stereo), about 6 minutes at 24-bit/48 kHz, and about 3 minutes at 24-bit/96 kHz. For a longer recording, open it in the audio cutter instead: it accepts larger files and can export the whole file, or any part of it, as an MP3.
It converts fine, but the extra resolution doesn't carry over. Your browser decodes the file and resamples it to your device's audio rate, usually 44.1 or 48 kHz, before the MP3 encoder runs. MP3 doesn't store a bit depth and can't go above 48 kHz anyway, so a 24-bit/96 kHz master won't give a better-sounding MP3 than a CD-quality copy of the same mix. There's nothing you need to change first.