TypeScript Formatter - Format & Beautify TS Online
Format and beautify TypeScript code online. Improve readability and clean up code. Free, runs in your browser—no data sent to servers.
Input
Output
What Is a TypeScript Formatter?
A TypeScript formatter reorganizes TypeScript code so it is consistently indented, properly spaced, and easy to read. It handles interfaces, classes, functions, type annotations, generics, and all standard TypeScript constructs. Good formatting makes code easier to review, debug, and maintain.
This tool has two modes: Format (beautify) and Minify (compress). Format adds proper indentation and whitespace; Minify removes comments and extra whitespace to reduce file size. Both run in your browser; no code is sent to a server.
How to Use This Tool
Choose Mode
Select Format to beautify TypeScript code with proper indentation, or Minify to compress it by removing whitespace and comments.
Paste Input
Paste your TypeScript code into the left editor. You can also click Sample to load an example, or Upload to load a file.
Copy Result
The right panel updates automatically. Use <strong>Copy</strong> or <strong>Download</strong> to save the result. To convert JavaScript to TypeScript, try JS to TypeScript.
TypeScript Formatter Examples
Before and after formatting a TypeScript class with an interface:
Unformatted TypeScript
Formatted TypeScript
When Formatting Matters
Consistent code formatting reduces cognitive load when reading code and makes diffs easier to review in pull requests. TypeScript projects often use tools like Prettier or ESLint with formatting rules for automated formatting. This tool is useful for quick one-off formatting without needing a local setup.
Minification is typically used for production builds to reduce bundle size. For full TypeScript compilation and bundling, use the TypeScript compiler (tsc) or a bundler like webpack or esbuild.
Frequently Asked Questions
Does this support all TypeScript features?
This tool uses a brace-based indentation formatter that works well for most TypeScript code including interfaces, classes, generics, and decorators. For production use, consider Prettier for full TypeScript AST-based formatting.
Is my code sent anywhere?
No. All formatting runs entirely in your browser. No code is transmitted to any server.
What does Minify do?
Minify removes single-line comments (//), multi-line comments (/* */), and collapses whitespace. This reduces file size. Note: minified TypeScript still needs to be compiled; it is not the same as minified JavaScript.
Can I format .tsx files?
Yes. TSX (TypeScript with JSX) follows the same brace-based structure and will be formatted correctly by this tool.
How is this different from the JS Formatter?
The TypeScript Formatter uses ace/mode/typescript for syntax highlighting and is tuned for TypeScript-specific constructs. The logic is similar but the editor mode provides TypeScript-aware highlighting.
Related Tools
TypeScript documentation covers the language in full. Prettier is the industry standard for TypeScript/JavaScript formatting. ESLint provides linting with formatting rules. The tsconfig reference covers compiler options.