What is this AVI to WebM converter?
A free, browser-based tool that converts a AVI video to WebM. Add a file, preview it inline, and download the result. All processing happens locally in your browser, so your video is never uploaded and there is no watermark.
Old AVI clips, embedded natively: the case for WebM
Say the archive page of your site needs the 2007 launch video inline, or a tutorial from the old knowledge base should play right inside the article. Browsers treat WebM as a first-class citizen of the <video> tag: no plugin, no player quirks, and files lean enough not to drag page weight down.
That is the one scenario where WebM beats MP4 as a target for legacy footage: pages you control, where bandwidth and native playback matter more than universal handoff.
AVI to WebM is always a full re-encode
WebM admits exactly three video codecs: VP8, VP9, and AV1. No codec that ever shipped inside an AVI is on that list, DivX and Xvid included, so this pair never remuxes. Every conversion decodes the old stream and re-compresses it, which takes real time and makes the quality setting an actual decision rather than a formality.
The trade rewards you in size: the WebM codec family is generations ahead of DivX-era compression, so a 100MB Xvid clip typically embeds at a fraction of its old weight. For anything other than web embedding, hand people an MP4 instead.
How to use it
- Add a AVI file on the left (drag & drop or click) — it shows an inline preview.
- Pick a quality preset (used only when the video has to be re-encoded).
- Press “Convert & download” to get your WebM file. The first run downloads the ~30MB converter once.
Lossless remux vs re-encoding
AVI and WebM are containers — what matters is the video codec inside. When the codec already fits WebM, this tool just repackages it (a "remux"): instant and completely lossless. Only when the codec isn't compatible — most often anything involving WebM — does it re-encode the video locally, which takes longer and is where the quality preset applies.