Convert Ogg Vorbis (.ogg) to WebM Video (.webm) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .ogg file by dragging it into the upload area or clicking to browse.
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OGG Vorbis is Xiph.org's open-source lossy codec with strong browser support in Firefox and Chrome. WebM is Google's open-source multimedia format based on Matroska, designed specifically for web content. WebM supports Vorbis and Opus audio codecs. Both formats are open-source and royalty-free, sharing similar design philosophies.
Converting OGG to WebM repackages the audio in Google's web-optimized container. Since WebM natively supports Vorbis, the audio stream can be remuxed without re-encoding. Alternatively, the audio can be upgraded to Opus for superior quality-per-bitrate.
WebM is the preferred format for web video platforms and HTML5 video elements. While OGG works for HTML5 audio, WebM is the expected format when audio accompanies video or when web platforms standardize on WebM. Google's web infrastructure and YouTube use WebM extensively.
Upgrading from Vorbis to Opus within WebM provides a significant quality improvement. Opus outperforms Vorbis at every bitrate, especially below 96 kbps. For voice content, Opus's hybrid SILK/CELT design provides dramatically better quality than Vorbis at low bitrates.
FFmpeg can remux Vorbis directly from OGG to WebM (-c:a copy) since WebM supports Vorbis natively. For quality improvement, FFmpeg can transcode to Opus (-c:a libopus) within WebM. Opus supports bitrates from 6 to 510 kbps with automatic mode selection. The WebM container is a Matroska subset restricted to VP8/VP9/AV1 video and Vorbis/Opus audio. Metadata transfers through the shared EBML structure.
When remuxing Vorbis directly to WebM, quality is identical to the source. When transcoding to Opus, quality at equivalent bitrates is better than Vorbis. Opus at 128 kbps significantly outperforms Vorbis at 160 kbps. The upgrade from Vorbis to Opus is one of the few transcoding operations that can actually improve perceived quality at a lower bitrate.
| Device | OGG | WebM |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Native | Native |
| Linux | Partial | Native |
| Web Browser | Native |
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
OGG to WebM offers both lossless remuxing (keeping Vorbis) and quality-improving transcoding (to Opus). Choose Opus for the best web audio experience.
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Jakýkoli prohlížeč, jakékoli zařízení
| Native |
| Vlastnost | OGG | WebM |
|---|---|---|
| Celý název | Ogg Vorbis | WebM Video |
| Přípona | .ogg | .webm |
| Nejlepší pro | Open source | Web optimized |