Convert WAV to MP3 Online — No Upload, No Watermark
WAV is the uncompressed PCM format used by recording studios, voice memo apps, and DAWs. Converting to MP3 gives you a small, universal audio file that every player, podcast host, and editor accepts without extra codecs.
Drop audio file here
Max file size: ~2 GB (memory permitting)
Where WAV files come from
WAV is what recorders, DAWs and interview rigs write, because it is uncompressed and nothing is decided yet. A minute of stereo CD-quality WAV is about 10 MB, which is why the files have to shrink before they go anywhere.
What changes when you convert WAV to MP3
| Encoding | Uncompressed PCM encoded to MP3 with LAME at V2 quality, averaging around 190 kbps |
|---|---|
| File size | Roughly one tenth of the WAV |
| Sample rate | Preserved as recorded |
Worth knowing first
This step is lossy and cannot be undone, so keep the WAV if it is your only master. Convert a copy for distribution and archive the original, especially for interviews or music you may need to re-edit.
FAQ
How much quality do I actually lose?
At V2, around 190 kbps, the difference from the WAV is inaudible to nearly everyone on nearly all material. Where it shows is in repeated editing: each re-encode compounds, so edit from the WAV and export MP3 once at the end.
Why is a WAV so large?
Because it stores every sample uncompressed. Stereo at 44.1 kHz and 16 bits is about 10 MB a minute regardless of content, so an hour-long interview is well over half a gigabyte before you have done anything to it.
Should I archive the WAV?
Yes, if you can. It is your lossless master, and every future export is better made from it than from an MP3 you would be re-compressing.
Is this WAV to MP3 converter free, with no upload?
Yes. Conversion happens locally in your browser via FFmpeg WebAssembly — your audio never uploads. No signup and no watermark. Length is limited only by the memory your browser gives this tab, which is far smaller on a phone than on a computer.