Convert Free Lossless Audio Codec (.flac) to Ogg Vorbis (.ogg) online for free. Fast, secure audio conversion with no watermarks or registration.
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OGG Vorbis is the open-source lossy audio codec developed by the Xiph.Org Foundation — the same organization behind FLAC. Converting FLAC to OGG keeps your audio within the open-source ecosystem while dramatically reducing file size. Vorbis was designed from the ground up as a patent-free alternative to MP3 and AAC, and at equivalent bitrates it outperforms MP3 in listening tests. OGG is the native audio format for Spotify's desktop client, many video games, and the Linux audio ecosystem.
If you prefer open-source formats and want lossy compression without patent concerns, OGG Vorbis is the natural choice. It produces smaller files than MP3 at equivalent quality, particularly at bitrates between 96-192 kbps. OGG is the standard format for game audio (Unreal Engine, Unity, Godot all support it natively), making this conversion essential for game developers who source music and sound effects from FLAC archives.
FFmpeg decodes FLAC to PCM and encodes using libvorbis (the reference Vorbis encoder) inside an OGG container. Vorbis uses modified discrete cosine transform (MDCT) with a variable block size of 64-8192 samples. Quality is controlled via a -1 to 10 quality scale (q5 ≈ 160 kbps, q7 ≈ 224 kbps, q10 ≈ 500 kbps). VBR is the default and recommended mode. The OGG container uses a page-based structure with CRC checksums for data integrity.
Vorbis at quality 5 (≈160 kbps) matches or exceeds MP3 at 192 kbps in double-blind listening tests. At quality 7 (≈224 kbps), it approaches transparency for most listeners. At quality 10, it is indistinguishable from the FLAC source for virtually all content. Vorbis is particularly strong at mid-bitrates where it handles transients and stereo imaging better than LAME MP3.
| Device | FLAC | OGG |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Native | Native |
| Linux | Partial | Native |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
FLAC to OGG Vorbis is ideal for open-source advocates, game developers, and anyone who wants excellent lossy compression without patent concerns. Use quality 5-7 for good results or quality 10 for near-lossless.
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| Native |
| Funktion | FLAC | OGG |
|---|---|---|
| Fullstandigt namn | Free Lossless Audio Codec | Ogg Vorbis |
| Filandelse | .flac | .ogg |
| Bast for | Lossless compression | Open source |