Convert Opus to FLAC — Free Online Converter

FLAC (Free Lossless Audio Codec) is the universal standard for lossless audio compression, supported on virtually every platform — Windows, macOS, Linux, Android, iOS (since iOS 11), and most dedicated audio players. Converting Opus to FLAC captures the full decoded audio from Opus's advanced compression algorithm into a losslessly compressed archive that can be reconverted to any format in the future without additional quality loss.

Opus, developed by Xiph.org and the IETF, is arguably the best lossy codec in existence, outperforming MP3, AAC, and Vorbis at every bitrate according to independent listening tests. However, it is still lossy — the encoding discards audio information deemed inaudible. By converting to FLAC, you preserve the maximum quality obtainable from the Opus decode in an open, patent-free format with the broadest possible platform support.

FLAC serves as the ideal archival format for decoded Opus audio because it compresses without discarding any data. If you have important Opus recordings — conference calls, interviews, podcast sessions, or musical performances recorded via WebRTC — converting to FLAC before any editing ensures that every processing step works from the highest-quality source available. FLAC files can be edited, processed, and re-exported to any lossy format (MP3, AAC, Vorbis) without the double-compression artifacts that occur when converting directly between lossy formats.

FLAC is also the required format for many online music stores (Bandcamp, Qobuz, 7digital), audiophile streaming services, and digital music distribution platforms. If you recorded audio via Opus and need to deliver it in lossless form, FLAC is the industry standard outside the Apple ecosystem.