TSX to JSX Converter — Strip TypeScript from React

This tool is a regex-based heuristic stripper, not a TypeScript compiler. It covers the common 80% case — components with typed props, state, event handlers, refs, and the occasional generic helper — fast and predictably. Read the output before relying on it, especially for code with conditional types, type predicates, satisfies clauses, or namespace blocks. For production-grade transpilation use the official TypeScript compiler or Babel @babel/preset-typescript.

How to convert TSX to JSX — 4 steps

1. Paste your TSX. Drop a React component file (.tsx) or any TSX snippet into the Input panel. Click Load Sample to try a typed Card component.
2. Click Convert. The regex pipeline runs in your browser — interfaces are dropped, annotations stripped, generics and assertions removed.
3. Review the output. Confirm props names survived, JSX tags are intact, and there are no leftover type fragments. The conversion is heuristic, so verify before shipping.
4. Copy and use. Paste into a JS-only sandbox (CodePen, JSFiddle), a Stack Overflow answer, a JavaScript codebase, or a tutorial.

What gets stripped

// Before
function greet(name: string, age: number = 30): string {
  const ok: boolean = age > 18;
  return `hi ${name}`;
}

// After
function greet(name, age = 30) {
  const ok = age > 18;
  return `hi ${name}`;
}

// Before
interface User { id: string; name: string; }
type Status = 'idle' | 'loading' | 'done';

// After
// (both lines removed)

// Before
function get<T>(x: T): T { return x; }
const ids = [1, 2, 3] as const;
const v = (data as Response).status;

// After
function get(x) { return x; }
const ids = [1, 2, 3];
const v = (data).status;

Common use cases

• check_circlePosting a minimal-repro to a JavaScript-only sandbox like CodePen or JSFiddle
• check_circleSharing a React example on Stack Overflow under a JS-only tag
• check_circleDowngrading a component for a project that has not migrated to TypeScript
• check_circleProducing a JS variant of a component for a beginner-friendly tutorial
• check_circleStripping types for a quick paste into a browser console or REPL
• check_circleForking a TypeScript example into a JavaScript-only build pipeline
• check_circleGenerating a smaller code sample for a screenshot or blog post
• check_circleDiffing the runtime semantics of TSX vs JSX side-by-side

Heuristic stripper vs proper compiler

A regex pipeline is fast, predictable, and easy to audit — but it does not understand the grammar of TypeScript. Some constructs the heuristic does not handle: conditional types in expression position (T extends U ? A : B outside a type alias is rare but exists in advanced libraries), type predicates (function isUser(x): x is User leaves a syntactic fragment if the predicate body wraps the colon awkwardly), satisfies expressions, namespace declarations, and deeply nested generic constraints with brackets in unusual positions. For these, run the official tsc --jsx preserve --target esnext --noEmit false --emitDeclarationOnly false or use Babel with @babel/preset-typescript. Both are AST-based and handle every grammatical edge case.