LoL Ruletext Checker is a Chrome extension developed by hard-wired. It allows users to view character information rule texts for Riot Games' game, League of Legends.

The extension displays Japanese rule texts that adhere to the data provided by Riot Games. However, please note that there may be discrepancies between the displayed information and the information available online, as the extension only references local resources.

The latest version, v0.5.1, addresses issues related to image quality. Previous versions have included updates to the Japanese data files for various patches, as well as support for new champions and champion remakes.

Overall, LoL Ruletext Checker is a useful tool for League of Legends players who want to access character information and rule texts conveniently within their Chrome browser.