AVI to WEBM Video Converter
Drop your AVI files — the WEBM video is generated in your browser in seconds. Multiple files at once, no upload on the fast path.
9,214+ video files converted
WebM is a popular target for a reason: it is best for Web embedding, open source. This converter encodes straight to WebM in your browser, so even large libraries convert quickly and privately — nothing is sent to a server on the fast path.
Looking to programmatically convert AVI to WEBM?
Same engine, available as a JSON API. Drop a file or URL via REST and get the converted video back — no browser, no UI, no rate limits on paid tiers.
Fast response on common video pairs
Webhook delivery for batch jobs
Dozens of video format pairs supported
AVI vs WEBM: how they compare
The numbers and capabilities at a glance, so you know what you're trading.
AVI
- Year released
- 1992
- Compression
- Codec-dependent
- Transparency
- No
- Animation
- Yes (video)
- Browser support
- Legacy players
- Best for
- Old software compatibility
WebM
- Year released
- 2010
- Compression
- VP9 (lossy)
- Transparency
- Yes (alpha)
- Animation
- Yes (video)
- Browser support
- Modern browsers
- Best for
- Web embedding, open source
Heads up before converting to WebM
What this specific conversion changes about your video.
Lossless when the codecs already fit
If your AVI uses codecs WEBM accepts, we remux (rewrap) it losslessly and instantly. A codec change re-encodes, which recompresses slightly.
Best practices for WebM
Small choices that keep your output sounding right.
- Play the WEBM result back before deleting your original AVI.
- Pick a preset (Web, Mobile, High quality) to balance size and quality for your WEBM.
The importance of a good video conversion
Why getting AVI → WEBM right matters more than you think.
Convert AVI to other formats
Convert other formats to WEBM