Front-End-Checklist

<div align="center">

# Front-End Checklist

**The essential checklist for modern web development, for humans and AI agents**

[![License](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
[![Backers on Open Collective](https://opencollective.com/front-end-checklist/backers/badge.svg)](#backers)
[![Support via Open Collective](https://opencollective.com/front-end-checklist/sponsors/badge.svg)](https://opencollective.com/front-end-checklist)
[![ProductHunt](https://img.shields.io/badge/ProductHunt-Launch-orange)](https://www.producthunt.com/products/front-end-checklist)
[![MCP](https://img.shields.io/badge/MCP-Ready-6366f1)](https://modelcontextprotocol.io)

</div>

---

Front-End Checklist is the open-source front-end quality system for humans and AI agents. It turns front-end best practices into a practical review workflow you can browse on the web, run through with MCP-compatible tools, or work through directly in this README.

---

## Introduction

- Website: [frontendchecklist.io](https://frontendchecklist.io)
- Rules: [frontendchecklist.io/rules](https://frontendchecklist.io/rules)
- MCP server: [mcp.frontendchecklist.io](https://mcp.frontendchecklist.io)

Companion project: [UX Patterns for Devs](https://uxpatterns.dev/) helps developers choose the right UI pattern before using Front-End Checklist to verify implementation quality.

> [!IMPORTANT]
> Use the website for browsing and filtering, the MCP server for agent workflows, and this README when you want the checklist in one place.

## What you get

- `386` English rules across `11` active categories
- `11` MCP tools exposed by the hosted server
- Rule pages with explanations, remediation guidance, and verification steps

## How to use this checklist

1. Start with the category navigator below and jump straight to the part of the checklist you need.
2. Work through the checkbox items that apply to your project, audit, or pull request.
3. Open the linked rule pages when you need the full guidance, examples, verification steps, and AI prompts.
4. Use [frontendchecklist.io](https://frontendchecklist.io) for interactive browsing, and [mcp.frontendchecklist.io](https://mcp.frontendchecklist.io) when you want agents to use the same rule corpus directly.

## Priority legend

- ![Critical][critical_img] means site-breaking, compliance-sensitive, or security-sensitive issues that should be fixed first.
- ![High][high_img] means issues with major impact on user experience, accessibility, performance, or discoverability.
- ![Medium][medium_img] means strong best practices that should be part of normal frontend quality review.
- ![Low][low_img] means useful improvements that are situational or lower urgency.

## Choose your workflow

### Browse online

- Explore all rules at [frontendchecklist.io/rules](https://frontendchecklist.io/rules)
- Use curated checklists at [frontendchecklist.io/checklists](https://frontendchecklist.io/checklists)
- Open a category page for focused audits and im