About This Site

Purpose

LoL Build Sim is an unofficial tool for League of Legends (LoL) players to explore and simulate builds outside of the game. It provides champion stat calculations, item effect verification, rune combination testing, and 1v1 damage simulation to help inform build decisions. Whether you're a beginner learning item selection or an experienced player quickly testing post-patch builds, this tool is designed to help.

Technology Stack

This site is built with Next.js (App Router), React, TypeScript, Tailwind CSS, and shadcn/ui. Champion and item data is sourced from the Data Dragon API provided by Riot Games, with some skill data referencing Meraki Analytics data.

Developer

Operator: Ashi. ~1.5 years of League of Legends experience, peak rank Emerald. This site is developed and operated independently. For inquiries or bug reports, please contact us via the contact page.

Disclaimer

This site is not an official Riot Games service and is not endorsed or sponsored by Riot Games. Displayed values may differ from actual in-game values due to game specification changes or patch updates. The operator assumes no responsibility for any damages resulting from the use of information on this site. League of Legends and Riot Games are trademarks of Riot Games, Inc.