Free online tool to convert OPUS to FLAC audio format. Fast, private, browser-based conversion.
Lossless format - bitrate setting not applicable
Drop audio files here or click to browse
Supports MP3, WAV, FLAC, AAC, OGG, M4A, WEBM, WMA, AIFF, OPUS, AC3, AMR
Most popular lossy format
Uncompressed lossless audio
Compressed lossless audio
Advanced lossy codec
Open-source lossy format
Apple's audio container
Web-optimized format
Windows Media Audio
Lossless uncompressed audio
Modern efficient codec
Dolby Digital audio
Mobile voice codec
All audio processing happens directly in your browser. Your files never leave your device.
Convert multiple files simultaneously. Download all results at once.
Powered by WebAssembly for near-native performance in your browser.
Adjust bitrate and quality settings for customized output.
Converting OPUS to FLAC can be useful when you need your audio in FLAC format for compatibility with specific software or workflows. However, note that converting from a lossy format (OPUS) to a lossless format (FLAC) will not recover audio data lost during the original compression. The resulting file will be lossless but will contain only the audio quality present in the OPUS source.
Lossy
Opus is a modern, open-source audio codec designed for interactive speech and music transmission over the Internet. It offers superior compression efficiency compared to MP3 and AAC, especially at low bitrates.
Lossless (Compressed)
FLAC is an open-source lossless audio codec that compresses audio without any quality loss. It typically reduces file sizes by 50-70% compared to WAV while preserving bit-perfect audio quality. FLAC is the preferred format for audiophiles and music archival.
| Format | Compression Type | Audio Quality | File Size | Compatibility | Best For |
|---|---|---|---|---|---|
| OPUS | Lossy | Good (bitrate-dependent) | Small | High (web/modern apps) | VoIP, web streaming, low bitrate |
| FLAC | Lossless (Compressed) | Perfect (bit-for-bit) | Medium | High (growing) | Audiophile collections, archival |
Yes, our OPUS to FLAC converter is completely free with no limits on file size or number of conversions. All processing happens in your browser, so there are no server costs or restrictions.
The conversion itself will not cause any additional quality loss, but converting OPUS (a lossy format) to FLAC (a lossless format) cannot restore audio quality that was already lost during the original OPUS encoding.
Conversion speed depends on the file size and your device's processing power. Since our converter runs entirely in your browser using WebAssembly, typical audio files convert in just a few seconds. Larger files or older devices may take slightly longer.
Absolutely. Your audio files never leave your device. All OPUS to FLAC conversion processing happens locally in your browser using WebAssembly technology. We don't upload, store, or have access to any of your files.
Yes, you can upload and convert multiple OPUS files to FLAC format simultaneously. Simply drag and drop all your files at once, and click "Convert All" to process them all. You can then download each file individually or use the "Download All" button.