Ultralight

Interfaces at the Speed of Light

Ultralight is a tool to display fast, beautiful HTML interfaces inside all kinds of applications.

Save time and money by writing your application's front-end with HTML while still retaining access to the power and performance of native C/C++ code.

Ultra-Light

Ultralight is only a fraction of the size and memory usage of other solutions and supports most modern HTML5 and JavaScript features (built upon same core as WebKit/Safari).

Ultra-Fast

Ultralight takes advantage of native hardware acceleration to offer best-in-class rendering performance across all platforms.

For Desktop Apps

Build HTML desktop applications for Windows, macOS, and Linux with only a fraction of the size of Electron.

Take advantage of low-level C++/JavaScript interop to further accelerate your application with native code.

Try the Quick-Start

For Games

Use Ultralight to display beautiful, low-latency HTML interfaces in your next game or GPU-based application.

Deeply integrate your rendering pipeline with our portable GPUDriver API to take performance to the next level.

Game Integration Guide

For Embedding

Use Ultralight to display or render offscreen HTML in a variety of applications and environments.

Use the low-level Platform API to take unprecedented control over file system access, font loading, rendering, and more.

Browse the API

FAQ

What platforms does Ultralight support?

Ultralight supports most major desktop PC platforms. Specifically, Windows (7+, x64), macOS (Sierra or later), and Linux (Ubuntu/Debian 9.5+, x64).

We're currently porting Ultralight to Xbox One and PS4, with plans to port it to ARM64 and others soon after.

What HTML/JS/CSS features does Ultralight support?

Ultralight supports most major websites out of the box!

There are few things still missing which you can track here.

We recommend trying out the Browser sample to get an idea of what Ultralight is capable of today.

Can I use it with React/Vue.js/Angular/etc ?

Yep! Ultralight uses the same JavaScript engine as WebKit/Safari.

Can I use it with my game engine?

Probably!

Ultralight can render to an offscreen bitmap for upload to a texture (see Sample 7 - OpenGL Integration) or— if you need extra performance— the engine can render directly to the GPU using low-level driver commands.

See our game integration guide for more info.

Can I use it from C#/.NET/Python/Rust/Go/etc.?

We maintain official API for C++ and C.

Several awesome members of our community maintain bindings for C#, Java, Rust, and Go on top of our portable C API.

Where can I find the source code?

The WebCore and AppCore modules are available open-source on GitHub.

The UltralightCore and Ultralight modules are proprietary— source code access to these repos can be obtained through a custom license.

Pricing

Free License

Free for non-commercial use.

Free* for use by companies with less than $100K annual gross revenue.

Only valid for use within applications.

Community support only.

No source code for proprietary modules.

*A license must be purchased if your company ever exceeds $100K gross annual revenue.

Get Started

Single Title License

For use of Ultralight 1.X in a single commercial application.

Unlimited number of platforms.

One year of e-mail support.

One year of source code access.

Pricing determined by gross annual revenue of company:

Annual Revenue	Fee (USD)
$0K - $500K	$2000
$500K - $2M	$4000
$2M - $10M	$8000
$10M+	Contact Us

Contact Sales

Custom License

Need something special?

We offer custom licenses for larger enterprise customers.

Source code access.

Extended support and custom integration consulting.

Batch discounts and site licensing.

Contact our sales team to discuss your needs today.