# mikke89/RmlUi

RmlUi - The HTML/CSS User Interface library evolved

Repository: https://github.com/mikke89/RmlUi
Canonical: https://ross.abutalabs.com/products/rmlui
Homepage: https://mikke89.github.io/RmlUiDoc/
Language: C++
License: MIT
License Family: permissive
Last push: 2026-08-24T22:34:01+00:00

## Health v2 (maintenance only)
Score: 88/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 67, longevity 100
- inputs: {"age_days": 3001, "days_push": 9, "days_rel": 11, "gap_med": 244.0, "n_releases_24m": 3}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4387, forks 462 (observed 2026-08-28T04:08:47.111706+00:00)

## What it is
RmlUi is a C++ user interface library based on HTML/CSS standards, forked from libRocket, that turns HTML/CSS-like markup into vertices and draw commands for games and applications. It includes its own layout engine, animation and transform support, a full control set, data binding, and optional Lua scripting.

## Use cases
- build game menus and HUDs with HTML/CSS-like markup
- create C++ application UIs without embedding a browser engine
- integrate a lightweight UI layer into a custom game engine renderer
- style interfaces with CSS-like stylesheets and animations
- add data-bound UI with MVC-style data binding in C++
- script UI logic with Lua

## When to choose
- you need a performant, lightweight UI for a C++ game or real-time application
- you want HTML/CSS authoring ergonomics without shipping a web browser
- you control your own render loop and want to bring your own renderer
- you need cross-platform UI including consoles and mobile

## When to avoid
- you need a full web browser with JavaScript and network stack
- you want a self-contained GUI framework that handles rendering and windowing for you
- your project is not C++ (or Lua) based
- you need accessibility features typical of native UI toolkits

## Facets
- artifact type: library
- maturity: active
- function: ui-components, templating, animation, graphics
- domain: cross-platform, web-development, desktop-applications
- platform: cpp, cross-platform, windows
- tags: html-css-ui, game-ui, librocket-fork, layout-engine, rml, game-development, linux, macos, android, ios

## Member repositories
- mikke89/RmlUi (main) score 88

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:47.111706+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:21:14.280663+00:00, confidence not recorded.
  - readme: https://github.com/mikke89/RmlUi (fetched 2026-08-28T04:08:47.111706+00:00, sha cb80c8fcaba6)
  - homepage: https://mikke89.github.io/RmlUiDoc/ (fetched 2026-08-29T09:09:13.951768+00:00, sha 46ff193949b6)
- Data as of 2026-08-30T08:39:29.467469+00:00.