Convert lossless FLAC files into the highly efficient Opus format, which sounds remarkably good even at low bitrates. Conversion runs right in your browser, with no upload of your music.
In “Local” mode your file never leaves your device. No uploads, no server – ideal for sensitive recordings.
Pick “Local” for full privacy or “Server” for very large files and every format.
No sign-up, no queue, no watermark. Choose a file, convert, download.
FLAC is lossless while Opus is lossy, so some detail is shed. Thanks to Opus's high efficiency, though, the audible difference stays very small.
Opus delivers excellent quality at a small file size, which makes it great for the web, streaming and space-saving collections.
In modern browsers, many apps and current players. On older devices, support can be limited.
No, conversion runs locally in your browser by default. For very large files there is an optional server mode.