Pixiv Ugoira WebM is a free Chrome add-on developed by Levi Castillo. It falls under the category of Browsers and is specifically classified under Add-ons & Tools. This program allows users to convert Pixiv Ugoira animations to WebM video files.

With Pixiv Ugoira WebM, users have the ability to convert any ugoira animation to either WebM or GIF formats. Additionally, users can choose between converting resized animations or full-screen animations, if available. The program also offers the option to download, view, or replace the original animation with the converted media.

Overall, Pixiv Ugoira WebM provides a convenient solution for Pixiv users who want to convert their ugoira animations into WebM video files. It is a user-friendly add-on that offers a range of features to enhance the ugoira viewing and sharing experience.