Now in Early Access

Work in your comfort zone. Render everywhere.

One JSON layout format. Unreal Engine, web Canvas, and beyond. Native Skia + Yoga rendering — no Chromium, no browser engine, no 200–400 MB overhead.

Get in TouchDownload Free Demo
<10 MB
Runtime Footprint
60fps
Target Frame Rate
<200ms
Hot-Reload
MIT
Core License
The Problem

The Hidden Cost of Embedded Browsers

Web browsers embedded in your UI are silently consuming vital gameplay resources.

The Chromium Tax

Embedded Chromium browsers consume hundreds of megabytes of memory and significant CPU cycles just to render basic UI elements.

200–400 MBmemory overhead per instance

Slow Iteration Cycles

Manual UI reconstruction for different form factors inflates development time. LittleUI hot-reloads layout changes in under 200 ms.

<200mshot-reload from JSON save to engine repaint
The Solution

Native C++ Rendering

Zero Chromium

A standalone C++ bridge renders pixels directly to GPU textures, bypassing the browser engine completely.

Skia + Yoga

Built on battle-tested rendering engines used by Google Chrome, Facebook, and React Native.

One Format, Any Host

The same JSON layout renders in Unreal, on Canvas in the browser, or in any engine that implements the open spec.

Features

Built for Unreal Engine Studios

Everything you need to ship high-performance UI in UE 5.3–5.7+.

Figma → Engine in Minutes

The Figma bridge polls your design file and writes layout.json. The engine hot-reloads in <200 ms — no hand-porting.

  • Live Figma polling bridge
  • <200ms hot-reload
  • No C++ required for layouts

Runtime Theme Swapping

Themes are DataAssets or JSON files. Switch at runtime with one call — layout is fully recomputed, no GPU stall.

  • DataAsset & JSON themes
  • Swap at runtime in one call
  • Per-node style overrides

Drop-In UE Integration

ULittleUIComponent drops onto any Actor. No base class required. Blueprint delegates for button callbacks.

  • No base class required
  • Blueprint-assignable callbacks
  • UV raycast input pipeline
Runtime Footprint
<10 MB
vs Chromium-based
200–400 MB
UE Versions
5.3–5.7+
Core License
MIT
Pricing

Simple, Honest Pricing

The core is free and MIT forever.

Free

$0

MIT-Licensed Core

  • Full C++ runtime source (MIT)
  • Layout spec v1.0
  • @littleui/sdk
  • @littleui/web (Canvas runtime)
  • Community support
Get Started

Need More?

Interested in the Unreal Engine plugin or enterprise licensing? Get in touch and we'll get back to you.