Converter
Audio to Smaller MP3 Converter
Convert Audio to Smaller MP3 locally in your browser. Shrink audio files locally with a bitrate slider.
Lower the bitrate slider for smaller files. 128k is a good balance for music.
Add audio
MP3, WAV, M4A, OGG, FLAC, OPUS and more.
Format & bitrate
Reduce audio file size by re-encoding to MP3 at a lower bitrate.
Frequently asked questions
Quick answers about converting Audio to Smaller MP3 in your browser.
How do I convert Audio to Smaller MP3?
Add your Audio file to the converter, adjust the available options, start the conversion, and download the Smaller MP3 file. Everything runs in your browser.
Is the Audio to Smaller MP3 converter free?
Yes. The Audio to Smaller MP3 converter is completely free with no sign-up, no watermarks, and no file count limits.
Are my files uploaded to a server?
No. Your files are read and converted locally in your browser, so they never leave your device.
What devices and browsers are supported?
It works in any modern browser on desktop, laptop, tablet, or phone — there is nothing to install.