---
title: "React Scan"
description: "Overlay that highlights which React components re-render and how expensive each render is, with no code changes or babel plugin."
canonical: "https://vibing.inc/library/react-scan-vg-0941"
category: "Dev Utilities & Vibe-Coding Tooling"
subcategory: "Perf & debugging"
license: "MIT"
author: "Aiden Bai (@aidenybai)"
source: "https://github.com/aidenybai/react-scan"
---

# React Scan
Overlay that highlights which React components re-render and how expensive each render is, with no code changes or babel plugin.
## Facts
- Source: https://github.com/aidenybai/react-scan
- Category: Dev Utilities & Vibe-Coding Tooling / Perf & debugging
- Author: Aiden Bai (@aidenybai)
- Licence: MIT
- Tags: react, performance, profiling, devtools
## Why it's a gem
Drop in a script tag and literally see the wasted renders outlined on screen.
---
Listed in The Vibeary: https://vibing.inc/library/react-scan-vg-0941 · JSON: https://vibing.inc/api/public/library/gems/react-scan-vg-0941