Runs on your device · nothing is uploaded

Encode a file.

Pick any audio file your browser can decode. rmps encodes it to MP3 in a worker thread and hands you the result — the file never leaves this page.

Quality VBR holds a perceptual signal-to-distortion target and lets the bitrate move to wherever that requires. Effort trades encode time for search width: the default of 2 encodes about ten times faster than 10, and above 192 kbps the difference is usually inaudible.