Convert Opus to FLAC Online Free
Convert Opus audio to FLAC lossless format for archiving, audiophile players, and systems requiring uncompressed or lossless audio. FFmpeg decodes your Opus and outputs it in FLAC's lossless container.
ChangeThisFile converts your Opus to FLAC using FFmpeg on secure servers. FLAC is a lossless open format widely supported by audiophile players, Roon, and Linux systems. Converting from Opus to FLAC stores the decoded audio without further compression loss — though quality is still bounded by the original Opus encoding. Files are auto-deleted, free with no signup.
Convert Opus to FLAC
Drop your Opus file here to convert it instantly
Drag & drop your .opus file here, or click to browse
Convert to FLAC instantly
Opus vs FLAC: Format Comparison
Key differences between the two formats
| Feature | Opus | FLAC |
|---|---|---|
| Compression Type | Lossy (very efficient) | Lossless |
| File Size (3 min) | ~1–4 MB | ~20–35 MB |
| Audio Quality | Lossy (excellent at 96+ kbps) | Lossless (no generation loss) |
| Browser Support | All modern browsers | Limited |
| Audiophile Player Support | Limited | Excellent (Roon, foobar2000, Revel) |
| Streaming | Excellent | Tidal, Deezer HiFi |
| WebRTC Use | Yes (mandated) | No |
| Open Standard | Yes (IETF) | Yes (Xiph.Org) |
When to Convert
Common scenarios where this conversion is useful
Archiving Opus audio in a lossless container
Convert Opus files to FLAC to archive them in a lossless container, preventing further quality loss from future re-encoding. The FLAC reflects Opus quality but will not degrade further.
Audiophile player and Roon integration
Audiophile players like Roon, foobar2000, and network audio servers prefer FLAC. Convert Opus tracks to FLAC for integration into high-fidelity listening systems that may not support Opus.
Linux music library management
Some Linux music players and tagging tools have better FLAC support than Opus. Convert Opus files to FLAC for broader Linux tool compatibility and metadata management.
Preventing future generation loss
If you need to convert Opus to multiple other formats for different use cases, converting to FLAC first means each subsequent conversion starts from the same decoded PCM quality.
How to Convert Opus to FLAC
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1
Upload your Opus file
Click the upload area or drag and drop your Opus (.opus) file. Files up to 50MB are supported. Your file is uploaded over HTTPS encryption.
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2
Convert to FLAC
Click Convert. FFmpeg decodes the Opus audio to PCM and losslessly compresses it into a FLAC file. The FLAC reflects the audio quality of the original Opus encoding.
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3
Download your FLAC file
Download the FLAC file when ready. It will be significantly larger than the Opus source. The file is auto-deleted from our servers after download.
Frequently Asked Questions
No. Opus is a lossy codec, and any compression artifacts in the Opus file carry over to the FLAC. FLAC is lossless, but the quality ceiling is set by the original Opus encoding. No lost audio data is recovered.
Compatibility and future-proofing. FLAC is supported by more audiophile players, NAS servers, and archival tools. Once in FLAC, future re-encoding to other formats introduces no additional generation loss.
Yes. Opus uses very efficient lossy compression. A 1-4 MB Opus file may become 20-35 MB as FLAC. This size increase is expected — FLAC stores the audio as uncompressed lossless PCM.
Yes. Roon has excellent FLAC support and is one of the best FLAC players available. FLAC files converted from Opus will play in Roon with full metadata display and DSP processing.
Yes. Foobar2000 has native FLAC support. The converted FLAC file will play perfectly in foobar2000, and you can run ReplayGain analysis and tag editing on it.
Yes. FFmpeg converts Opus Vorbis comment metadata to FLAC's Vorbis comment format. Title, artist, album, and track number fields transfer. FLAC and Opus both use Vorbis comment tags, making this a clean transfer.
Not natively in the Music app. You need VLC for iOS to play FLAC on iPhone. For Apple Music library use, converting to M4A or AAC is recommended instead.
Yes. Files are uploaded over HTTPS, processed by FFmpeg on our server, and automatically deleted after download. We do not retain or analyze your audio content.
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