WAV to MP3 Converter – Free, Fast & Private
Convert uncompressed WAV files to MP3 locally in your browser — about 10× smaller, nothing uploaded
How to convert WAV to MP3
Choose or drag in your WAV file — nothing is uploaded, it stays on your device.
Conversion starts instantly — the audio is extracted and encoded to MP3 right in your browser, with live progress.
Download your MP3 file.
Everything happens right here in your browser: your file is converted locally on your device with WebAssembly FFmpeg and is never uploaded to any server. Because there is no upload, there is no practical length limit either — multi-hour recordings and files up to 8GB convert just fine, and even a huge file starts instantly. Read more: how in-browser conversion works →
About WAV to MP3 conversion
WAV is uncompressed: a single hour of audio is roughly 600MB. That is the right format inside a recording session, and the wrong one for sharing, archiving or uploading anywhere. Converting to 192–320kbps MP3 makes the file about 10× smaller with no audible difference for speech and most music.
Large WAV files are exactly where browser-local conversion shines — there is no 600MB upload before the work even starts. The file is read and encoded directly on your device.
Frequently asked questions
Roughly 10× smaller: CD-quality WAV runs about 10MB per minute, while 192–320kbps MP3 runs about 1.4MB per minute. An hour-long recording drops from ~600MB to ~60MB.
For speech, no. For music, 192–320kbps MP3 is very close to transparent in normal listening. Keep the WAV original if you plan further editing — convert to MP3 for sharing and listening.
The common PCM variants: 8/16/24/32-bit integer and 32/64-bit float, mono or stereo, at any sample rate — which covers what audio editors, field recorders and DAWs export.
No. The conversion runs entirely in your browser using WebAssembly (FFmpeg). Your recording never leaves your device — that is also why there is no upload wait, no queue and no file-size pricing. For personal recordings, lectures and meetings this matters more than anywhere else.
Up to 8GB on desktop browsers and 2GB on mobile — big enough to pull the audio out of a multi-hour lecture or meeting recording. There is no limit on the number of files, no signup and no watermark.
192–320kbps, which is transparent for speech and very close to transparent for music. The audio stream is decoded once and encoded once — there is no extra generation loss from server-side re-processing.
Yes — completely free and unlimited, with no watermark, signup or daily quota. Because the conversion runs on your own device instead of our servers, there are no processing costs to charge for.
Yes. It runs in any modern browser — Chrome, Safari, Edge or Firefox — on Windows, macOS, ChromeOS, Linux, iOS and Android. There is nothing to install.
Audio-only work is fast: there is no video to re-encode, so even the soundtrack of a long video converts in well under real time. Files whose audio is already MP3 are rewrapped without re-encoding and finish in seconds.
Yes. Our sister site Red Panda Transcribe (redpandatranscribe.com) turns the MP3, M4A or WAV you export here into text right in your browser — like this tool, nothing is uploaded, and there is no time limit and no signup. It exports TXT, SRT and VTT.