What is lexbor?

We build a web browser engine available as a software library; it ships under the Apache 2.0 license and has no extra dependencies.

What’s the news?

Check out the latest version and our future roadmap here or follow our work on GitHub.

Our Goals


For us, speed is an absolute must. Our development process is focused on fastest HTML, CSS, and font parsing; fastest data processing; and fastest ways to serve end user content.

Whether you are building a backend to serve millions of HTML documents or a UI-heavy app, your response rates always stay our top priority.


The code is optimized for ease of access in end-user applications, across varied programming languages.

To put it simply, lexbor offers a feature-rich core that you can build upon as you wish to. Need to build a Python wrapper to power your frontend or backend apps in a new environment? No problem.


From the very start, we focus on availability and support in vastly different environments.

When you use lexbor, you need not worry about your app’s portability; from the ground up, we designed lexbor for wide support across various computing platforms and IoT devices.


An easy-to-use, simple, comprehensible API is our key to fast and safe software development.

Offering you a degree of flexibility you always wished for, lexbor's API enables fine-tuning HTML processing just the way you want it.


Web browser engine development. Part Two: CSS

In this article, I will try to delve into the peculiarities of parsing Cascading Style Sheets (CSS). I'll explain how to turn the "hedgehog" inside out and how to test the obtained result.

Web browser engine development. Part One: HTML

In this article, I will tell you how to create a superfast HTML parser supporting DOM. We will look at the HTML specification and its disadvantages in terms of performance and resource consumption during HTML parsing.

I assume the reader has a basic knowledge of HTML: tags, nodes, elements, and namespace.