# Simon Willison develops URL-based LaTeX renderer using Claude Code

> **Key takeaway:** A new tool allows users to share and bookmark LaTeX documents by storing the source code directly in the URL fragment.

**Published:** 2026-10-15T02:07:28+00:00 
**Source:** Simon Willison Web & Open Source 
**Category:** software-engineering 
**Canonical URL:** https://fosswire.org/news/simon-willison-develops-url-based-latex-renderer-using-claud.html 

## Summary
Simon Willison has created a web-based LaTeX renderer that enables bookmarkable and shareable documents via URL fragments. Developed with the assistance of Claude Code, the tool supports both single equations and full document rendering. It includes features for loading LaTeX from URLs or GitHub Gists and uses compression to optimize link length.

## Technical implementation of the LaTeX tool
- Uses **MathJax 4.1.3** for single display equations and **faster-latex 0.3.1** for full documents.
- Implements **Pako 2.1.0** for LaTeX-optimized compression to keep URL fragments manageable.
- Employs **DOMPurify 3.4.16** and an **iframe sandbox** mechanism to mitigate XSS risks.
- Supports loading source code from external URLs or GitHub Gists.

## Why it matters
The tool demonstrates a workflow for creating stateless, shareable web documents using LLM-assisted development and URL-based data storage.