OGV to WebM Converter
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Supports: OGV
Advanced Options - Our defaults are optimized for the best results. We recommend you keeping the defaults unless you have a specific need.
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Need help?How to Convert OGV to WebM Online
- Upload Your OGV Files — Drag and drop or select one or more OGV (Ogg Theora) video files.
- Choose a Quality Preset — Select from Highest, Very High (Recommended), High, Medium, Low, Very Low, or Lowest. The default "Very High" balances quality and file size.
- Adjust Resolution (Optional) — Keep original, pick a preset (4320p/8K down to 144p), set a percentage, or enter exact width × height in pixels.
- Trim (Optional) — Set a start time and duration in seconds or HH:MM:SS.sss to extract a specific segment.
- Convert & Download — Click Convert and download your WebM files.
The video codec defaults to VP9 for WebM output, and the audio codec defaults to Opus. Both can be changed under Advanced settings — VP8 and Vorbis are also available for WebM.
Why Convert OGV to WebM?
OGV (Ogg Video) uses the Theora codec from 2004 — a pioneer of open-source web video that has been superseded by WebM. WebM uses VP8 or VP9 codecs backed by Google, delivering 30–50% better compression than Theora at the same visual quality. Both formats are royalty-free and open-source, so converting from OGV to WebM is a natural upgrade that preserves the patent-free philosophy while gaining modern browser support and smaller file sizes.
OGV vs WebM Comparison
| Feature | OGV (Ogg Theora) | WebM (VP9) |
|---|---|---|
| Video codec | Theora (2004) | VP9 (2013) / VP8 (2010) |
| Audio codec | Vorbis | Opus or Vorbis |
| Compression efficiency | Baseline | 30–50% better than Theora |
| Browser support (2026) | Limited — dropped by many | Chrome, Firefox, Edge, Opera, Safari 14+ |
| HTML5 native | Early stopgap | Purpose-built for HTML5 <video> |
| Royalty-free | ✅ | ✅ |
| Actively maintained | ❌ (legacy) | ✅ (Google-backed) |
Use Cases
- Legacy website migration — Old sites with OGV
<video>fallbacks need updating. WebM plays reliably in all modern browsers. - Linux screen recordings — Many Linux distros defaulted to OGV for screen capture. WebM maintains the open-source ethos with better compression.
- Open-source project archives — Educational and FOSS projects with OGV video libraries benefit from smaller files and broader compatibility.
- HTML5 video optimization — WebM with VP9 is one of the most efficient web video formats, second only to AV1.
Is WebM better than OGV?
Yes, in every practical measure. WebM uses more modern codecs (VP9/VP8) that compress 30–50% better than OGV's Theora. WebM also has broader browser support and is actively maintained by Google. OGV is effectively legacy technology.
Will converting OGV to WebM reduce quality?
Transcoding between lossy formats can technically affect quality, but using the "Very High" Quality Preset produces output that is visually indistinguishable from the source. Most users see smaller files with no perceptible quality loss.
Does WebM work in Safari?
Safari added WebM support in version 14 (macOS Big Sur, 2020). Older Safari versions do not support WebM. For universal compatibility including older Safari, also create an OGV to MP4 version.
What video codec does the WebM output use?
VP9 by default, which offers the best compression for WebM. You can switch to VP8 or AV1 under the Video Codec option in Advanced settings.
Can I change the audio codec?
Yes. The default audio codec for WebM is Opus (excellent compression for both speech and music). You can switch to Vorbis under Audio Codec in Advanced settings if you need compatibility with older WebM players.