About this opus to mp3 converter
Opus is the codec behind WhatsApp, Telegram and Discord voice messages: tiny files tuned for speech, but many players and editors cannot open them. MP3 is the compressed audio format every phone, car stereo and player supports. The conversion runs in your browser with ffmpeg compiled to WebAssembly, so the file never leaves your device and there is no size limit beyond your memory. Both formats are compressed, so pick a bitrate at least as high as the source to avoid audible loss.