MP3 Converter
Upload any audio file, transcode it locally, then preview and download a standard MP3 file — free, private, and processed entirely in your browser.
About the MP3 Converter
Our free online MP3 converter transcodes any audio file — WAV, OGG, M4A, FLAC, and more — into a standard, universally compatible MP3. It's the easiest way to shrink a lossless or uncompressed audio file down to a portable format that saves device storage and plays everywhere.
The entire conversion happens locally in your browser using the native Web Audio API to decode your source file, then a JavaScript MP3 encoder to package the result. Nothing is ever uploaded to a server, so your audio stays completely private and secure.
How to Convert Audio to MP3
Step 1
Upload your audio file
Drag and drop a WAV, OGG, M4A, FLAC, or other audio file, or choose one from your device.
Step 2
Click "Convert to MP3"
Run the local transcoder to decode and re-encode your audio into a standard MP3 file.
Step 3
Preview and download
Listen to the converted MP3 in the built-in player, then download your file instantly.
Frequently Asked Questions
What audio formats can I convert?
We support all major audio formats including WAV, M4A, FLAC, and OGG — anything your browser's Web Audio API can decode.
Are my files safe?
Yes. All transcoding is executed locally in your browser — no files are ever uploaded to our server.
Will converting reduce my audio quality?
MP3 is a lossy format, so a small amount of quality is traded for a much smaller file size — the same tradeoff as any standard MP3 encoder.
Does it cost money?
No. Converting your audio to MP3 is 100% free, with no registration or account required.