React Error Boundary Generator
Generate production-ready error boundary components for React applications
About this ToolHow it works, benefits & use casesTap to collapse
A React error boundary is a class component with getDerivedStateFromError and componentDidCatch — repetitive to write by hand, so this generator produces a complete, production-ready one. Name your component, pick a fallback UI style, and it emits a class boundary with the 'use client' directive, proper state shape (hasError, error, errorInfo), and the lifecycle methods wired up. Three fallback styles are available: Simple (a plain message with an optional retry button), Detailed (a styled panel that reveals the error and component stack only in development), and Custom (renders a fallback passed via props). Checkboxes add TypeScript types and interfaces, error logging with a commented Sentry example, and a resetErrorBoundary method tied to the retry button. A "Show Usage" button switches the output to an example showing how to wrap components and nest boundaries for granular handling. Copy, download as .tsx/.jsx, or share via URL — all client-side.
How to Use
- 1Enter a Component Name (defaults to ErrorBoundary).
- 2Choose a Fallback UI Type: Simple, Detailed (dev-mode error details), or Custom (uses props.fallback).
- 3Toggle TypeScript support, error logging, and reset functionality with the checkboxes.
- 4Click "Generate Component" to emit the boundary, or "Show Usage" for a wrapping example.
- 5Copy, download as .tsx or .jsx, or share the result via its URL.
Key Benefits
- Generates a complete class-based error boundary with the correct lifecycle methods
- Three fallback styles: Simple, Detailed (dev-only details), and Custom via props
- TypeScript toggle adds Props/State interfaces and typed method signatures
- Optional error logging with a ready-to-uncomment Sentry example
- Optional resetErrorBoundary method wired to a Try Again button
- "Show Usage" outputs wrapping and nested-boundary examples
- Adds the 'use client' directive for Next.js App Router compatibility
Common Use Cases
- Adding a top-level boundary so a render error does not white-screen the whole app
- Wrapping independent features in granular boundaries with their own fallbacks
- Generating a boundary that logs caught errors to Sentry or another service
- Producing a TypeScript boundary with proper Props and State interfaces
- Learning the getDerivedStateFromError / componentDidCatch pattern from real code
Configuration
Run to see the generated error boundary component.
Error Boundary Best Practices
- Use error boundaries to prevent entire app crashes
- Place boundaries strategically around independent features
- Always log errors to monitoring services (Sentry, LogRocket, etc.)
- Provide meaningful fallback UI to users
- Error boundaries don't catch errors in event handlers or async code
Was this tool helpful?
Share Your Experience
Help others discover this tool!
Related tools
- TypeScript FormatterFormat and beautify TypeScript code
- Component Name GeneratorTurn a description into ranked, kind-aware component names with a file scaffold and a name validator (casing, collisions, clarity)
- SVG to React ComponentConvert SVG to a clean TSX/JSX/React Native component — currentColor, prop spread, forwardRef, memo, live preview
- Changelog GeneratorGenerate changelog from Git commit history
- Heroku Procfile GeneratorBuild a Heroku Procfile and matching app.json — process types, env vars, addons, dyno formation — plus a Procfile parser and audit
- Markdown TOC GeneratorGenerate table of contents for Markdown
Simple renders a plain "Something went wrong" message with an optional retry button. Detailed renders a styled panel and, in development only, reveals the error message and component stack inside a collapsible details element. Custom renders whatever you pass via props.fallback, falling back to a minimal message if none is provided.
No — and that is a React limitation, not a tool one. Error boundaries catch errors thrown during rendering, in lifecycle methods, and in constructors of the tree below them. They do not catch errors in event handlers, asynchronous code (setTimeout, promises), server-side rendering, or errors thrown in the boundary itself.