Convert WAV to MP3 in your browser and compress a recording to a fraction of its size. A CD-quality WAV runs at 1,411 kbps, so the default 192 kbps MP3 is about a seventh as large: a five-minute WAV of about 53 MB becomes an MP3 of about 7 MB, small enough to email. That is the usual fate of demos, voice-overs and podcast takes that leave a recorder or a DAW as WAV. Choose 128, 192, 256 or 320 kbps. The MP3 is encoded on your own device by LAME, the open-source MP3 encoder, compiled to WebAssembly, and the WAV is never uploaded.
How it works
- Drop the WAV, or a batch of up to 200 recordings totalling 2 GB or less.
- Pick the bitrate: 128 kbps for speech, 192 kbps (the default) for most music, 320 kbps for the most the MP3 format allows. Trim silence off either end while you are here if you need to.
- Convert and download the MP3, or one ZIP holding every MP3 and a short report of what converted.
Questions
- Which MP3 bitrate should I choose?
- For speech, podcasts and voice notes, 128 kbps is plenty, at about 1 MB per minute. For music, 192 kbps is where most listeners stop hearing a difference from the WAV, which is why it is the default. Choose 256 or 320 kbps for music you care about or a file someone will listen to closely; they cost about 1.9 and 2.4 MB per minute.
- Can I convert WAV to MP3 at 320 kbps?
- Yes. Choose 320 kbps in the bitrate menu before converting. It is the highest bitrate the MP3 standard defines, about 2.4 MB per minute, and still under a quarter of the size of a CD-quality WAV. Use it for a master or a mix you are sending for review, where the listener should hear as little of the compression as possible.
- Can I convert WAV to MP3 on a PC without installing anything?
- Yes. This page is the converter, and it runs in the browser you already have on Windows, macOS or Linux. The MP3 encoder runs as part of the page, so there is no program to install and no account to create. The WAV is read from your disk, the MP3 is saved to your downloads, and nothing is uploaded in between.
- Does my file get uploaded?
- No. The models and all processing run inside your browser on your own device. You can verify this yourself: open your browser’s DevTools, watch the Network tab, and process a file: there are no uploads. After the first visit most tools also work fully offline.
- Which formats can it read?
- Anything your browser can decode: MP3, WAV, M4A/AAC, OGG, Opus, FLAC and the audio track of MP4/WebM/MOV video. Output is MP3 or WAV, the two formats that open everywhere.
- Does converting to MP3 lose quality?
- MP3 is lossy, so some information is discarded, though at 192 kbps and above most people cannot hear the difference. WAV output is lossless and correspondingly larger. Converting MP3 to WAV does not restore quality that was already gone.