No. Decode and encode run entirely in your browser.

Does converting FLAC to MP3 lose quality?

Yes — MP3 is lossy. Keep the FLAC if you need an archive; use MP3 for sharing.

What bitrate should I use?

192 kbps is a solid default. Use 320 for music you care about, or 128 for speech.

Up to 80 MB or 30 minutes. Longer FLACs need a desktop tool.

Turn a lossless FLAC into a smaller MP3 for sharing. Runs in your browser. Your file never leaves this device.

Choose a FLAC file (any audio file works)
Pick a quality (default High, 192 kbps); set an exact bitrate under Advanced settings
Click Convert and wait for encoding
Preview, then download the MP3