FormatMillNothing leaves your device

Opus to FLAC

Convert Opus to FLAC in your browser. Your file is never uploaded.

This free Opus to FLAC converter runs in your browser. Drop in a Opus file and download a FLAC a moment later, with no upload, no sign-up, and nothing to install. Because the work happens on your own device, your file never leaves it.

What is Opus?

Opus is a modern open codec that beats MP3 and AAC at low bitrates. It is the default for voice and music in many chat and streaming apps.

What is FLAC?

FLAC compresses audio losslessly, cutting file size by roughly half while keeping every detail of the original. It is the usual choice for archiving music.

Questions

Is the Opus to FLAC converter free?

Yes, it is free with no sign-up and no watermark. There is no cap on how many files you can convert, and nothing to install.

Do my files get uploaded to a server?

No. The conversion runs entirely in your browser using code that loads onto your device, so the file is read, converted, and downloaded locally. It never reaches us or anyone else.

Will converting improve the quality?

No. FLAC is lossless, but it can only preserve what is already in the Opus; it cannot restore detail that lossy compression has already discarded. The file may also be larger.