Convert OGG to FLAC — Free Online Converter
Convert Ogg Vorbis (.ogg) to Free Lossless Audio Codec (.flac) online for free. Fast, secure audio conversion with no watermarks or registration....
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Upload your .ogg file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .flac file when it's ready.
About OGG to FLAC Conversion
OGG Vorbis is Xiph.org's lossy audio codec, delivering excellent quality at moderate bitrates. FLAC (Free Lossless Audio Codec), also from the Xiph.org family, is the universal open-source lossless standard. Both share the Xiph.org lineage — Vorbis comments work identically in both formats, and they share the same metadata system. FLAC achieves 50-60% compression compared to raw PCM.
Converting OGG to FLAC decodes the Vorbis audio to PCM and re-encodes it losslessly. The FLAC output preserves the full decoded quality of your OGG source in a lossless container, creating a permanent archive that won't degrade with future transcoding operations.
Why Convert OGG to FLAC?
FLAC provides a lossless safety net for your OGG audio. If you need to transcode to AAC, MP3, or any other format in the future, starting from FLAC avoids the generation loss of transcoding from one lossy format to another. The FLAC file captures the full fidelity of what Vorbis preserved.
Since OGG Vorbis and FLAC share the Xiph.org metadata system (Vorbis comments), tag compatibility is perfect — every metadata field transfers directly without mapping or translation. Album art, ReplayGain values, and custom tags all carry over seamlessly.
Common Use Cases
- Archiving OGG music libraries in lossless format to prevent further generation loss
- Creating lossless masters from OGG sources for future format transcoding needs
- Preserving decoded OGG quality in a format ready for Bandcamp or other lossless platforms
- Building a lossless music server library from OGG collections
- Preparing OGG audio for editing in DAWs that prefer lossless input formats
How It Works
FFmpeg decodes the Vorbis stream to PCM and encodes using the FLAC encoder. Since both formats belong to the Xiph.org ecosystem, Vorbis comments transfer directly to FLAC without any metadata mapping — they use the identical tag system. FLAC compression levels 0-8 trade speed for size without affecting quality. The encoder stores an MD5 checksum of the decoded PCM for integrity verification. The output preserves the source sample rate, bit depth, and channel layout.
Quality & Performance
FLAC encoding is lossless — every decoded Vorbis sample is preserved exactly. The overall pipeline is bounded by the OGG source quality: FLAC cannot restore information Vorbis discarded. The benefit is that future transcoding from FLAC avoids the double-lossy problem. FLAC files are larger than OGG (roughly 5-6 MB/min vs 1.2 MB/min for Vorbis Q5) because lossless compression preserves all decoded audio data.
Device Compatibility
| Device | OGG | FLAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Native | Native |
| Linux | Partial | Native |
| Web Browser | Native | No |
Recommended Settings by Platform
Spotify
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Apple Music
Resolution: N/A
Bitrate: 256 kbps
AAC format required
SoundCloud
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Podcast
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
Tips for Best Results
- 1Use FLAC as an intermediate archival format before making AAC, MP3, or other lossy copies — this prevents double-lossy quality loss
- 2Leverage the shared Vorbis comment system for seamless metadata transfer between OGG and FLAC
- 3Add ReplayGain tags during conversion for normalized playback volume across your library
- 4FLAC level 5 provides the best speed/size tradeoff — higher levels save minimal space at much slower encoding
- 5Verify the conversion with FLAC's built-in MD5 checksum to confirm lossless integrity
Related Conversions
OGG to FLAC converts lossy Xiph.org audio to lossless Xiph.org audio with perfect metadata compatibility. Use FLAC as a lossless archive to prevent further generation loss.