JSX Tool
JSX Tool is a YC Fall 2025 (F25) company. Team of 2.
About JSX Tool
Summary
JSX Tool builds a browser extension and in-browser IDE for React developers. It maps running UI elements back to their source components and files with a click, letting developers make precise visual requests to LLMs without switching to a separate editor or writing verbose code descriptions. It replaces the manual process of hunting down component locations and context-switching between the browser and a desktop IDE during React development.
Go-to-market
React developers install the browser extension directly into their existing workflow, making adoption self-serve and frictionless without a sales process.
From the Y Combinator listing
AI-First In-Browser IDE for React Development
JSX Tool is a browser extension that hooks into your React project, so you can easily locate any React component and file with just a click. This gives developers the ability to articulate visual requests to LLMs that without JSX Tool, are either vague or cumbersome to communicate in English and code snippets. On top of that JSX Tool is a full featured IDE tailored specifically for React Development, so users never have to leave the context of their browser when developing React code.
Facts
- B2B / B2B -> Engineering, Product and Design
- 2
- Active
- Early
Founders (1)
- Dan Hyman
Score every batch against your own thesis
GPAgent's sourcing agent reads every company in a batch, scores each one against your fund's thesis in a private workspace, and lines up the founders worth meeting before Demo Day. You decide who to contact. Your scores, notes, and pipeline never appear on these pages.
How Accelerator intelligence works