AnyTool
Your files never leave your device. All processing happens locally in your browser.

How do I convert TypeScript to JavaScript online?

Paste your TypeScript into AnyTool and it compiles to plain JavaScript instantly using the real TypeScript compiler. Choose the ES target, module format, and JSX mode to control the output. It runs entirely in your browser, so your code is never uploaded.

  • Real TypeScript compiler — handles generics, enums, decorators, satisfies
  • Pick ES target (ES5…ESNext), module (ESM/CommonJS/AMD/UMD), and JSX
  • Live, as-you-type transpile with copy and download
  • Strips types and down-levels syntax like a local build
  • 100% in-browser — no upload, no daily caps, works offline

What is

TypeScript Transpilation

Transpiling TypeScript to JavaScript removes the type annotations and rewrites modern syntax into a target JavaScript version that browsers and runtimes can execute. The official TypeScript compiler does this faithfully, including class fields, async/await, and module conversions.

Developer Tools

Related terms

TypeScript CompilerECMAScript TargetType StrippingJSXTranspiler

Frequently Asked Questions

It uses the official TypeScript compiler, not a regex stripper.

It runs the real TypeScript compiler (ts.transpileModule) in your browser, so generics, enums, decorators, namespaces, conditional and mapped types, and import type all convert correctly — and it can truly down-level to older ECMAScript targets, which simple strippers cannot.

No — the compiler runs locally and your code never leaves the browser.

Everything is processed client-side with the self-hosted TypeScript compiler. Unlike AI converters that upload your code and limit free conversions, this tool is free, deterministic, has no daily caps, and works offline.

Yes — pick the ES target, module system, and JSX mode.

You can select an ECMAScript target from ES5 to ESNext, a module format (ESNext, ES2015, CommonJS, AMD, UMD, SystemJS), and a JSX mode (preserve, react, react-jsx). The output re-compiles instantly when you change any option.

Detailed Explanation

Methodology

How TypeScript to JavaScript Conversion Works

AnyTool runs the official TypeScript compiler (ts.transpileModule) directly in the browser to strip types and emit JavaScript. Users choose an ECMAScript target (ES5 through ESNext), a module format (ESNext, ES2015, CommonJS, AMD, UMD, SystemJS), and a JSX mode, and the output recompiles live. Because it is the real compiler, generics, enums, decorators, namespaces, conditional/mapped types, and import type all convert correctly, and older targets are genuinely down-leveled.

  • Official TypeScript compiler, not a regex stripper
  • Selectable ES target, module format, and JSX mode
  • Real down-leveling of class fields, async/await, optional chaining
  • Live as-you-type transpile with diagnostics
  • Self-hosted compiler — no runtime CDN
Privacy & Security

Privacy and Offline Use

The TypeScript compiler is bundled and runs in a Web Worker entirely on the client, so code is never uploaded. Unlike AI converters that send code to a server and cap free conversions, this tool is deterministic, free, has no daily limits, and works offline after the compiler chunk is cached.

TypeScript to JavaScript: AnyTool vs typical tools
CapabilityAnyToolTypical tools
EngineOfficial tscRegex stripper or server AI
Choose ES targetYesRare
Choose module formatYesRare
Processing locationIn-browserOften server-side
Free, no capsYesOften limited

Capabilities reflect the live AnyTool tool; competitor behavior varies by service.