TypeScript Formatter & Beautifier
Format, beautify, and clean up your TypeScript code instantly in a secure, client-side environment.
Formatted output will appear here...About Typescript Formatter
TypeScript Formatter is a free online tool that takes minified, compressed, or inconsistently indented TypeScript code and reformats it into clean, readable source. It handles all TypeScript-specific syntax — interfaces, type aliases, generics, enums, decorators, async/await, and class definitions — applying consistent indentation and brace placement so the structure of your code is immediately clear.
You would reach for this tool when you receive a minified .ts file from a build artifact, copy a snippet from documentation that has lost its formatting, or review auto-generated code from a framework that outputs everything on one line. Unlike running a local formatter such as Prettier, there is nothing to install or configure: paste your code, click Format, and the result is ready to copy or download as a .ts file. A built-in Minify mode also works in the opposite direction, stripping comments and collapsing whitespace when you need a compact version for embedding.
All formatting is done entirely in your browser using the js-beautify library. Your TypeScript source never leaves your machine and is never sent to a server, logged, or stored anywhere. This makes the tool safe for proprietary application code, internal library types, and any TypeScript that contains business-sensitive logic.
Key Features
Formats TypeScript-specific syntax
Correctly handles interfaces, type annotations, generics like Array<T>, enums, decorators, and async function signatures — not just plain JavaScript constructs.
Bidirectional: format and minify
One tool handles both directions. Use Format to expand minified code into readable source, or Minify to strip comments and collapse whitespace for embedding or comparison.
Configurable indentation
Choose 2-space, 4-space, or tab indentation from the toolbar before formatting, so the output matches your team's code style guide without any extra editing.
File upload and download
Load a .ts or .tsx file directly from disk instead of copying its contents. After formatting, download the result as formatted.ts with a single click.
100% client-side, no installation
Formatting runs locally in your browser via js-beautify. No account, no install, no server upload — your proprietary TypeScript stays on your machine.
Built-in sample code
Use the Sample button to load a realistic TypeScript snippet featuring interfaces, generics, and async classes, so you can preview the output format before pasting your own code.
How to Use
Paste Your TypeScript
Copy your minified or messy TypeScript code and paste it into the input editor on the left.
Format or Minify
Click "Format" to beautify with proper indentation, or "Minify" to compress for production use.
Copy the Result
Use the copy button to grab your formatted TypeScript, or download it as a .ts file.
Example
A minified TypeScript snippet containing an interface and a generic async function is expanded into indented, readable source with the 2-space indent option.
interface User{id:number;name:string;email:string;isActive:boolean}async function fetchUser(userId:number):Promise<User>{const response=await fetch(`/api/users/${userId}`);if(!response.ok){throw new Error(`HTTP ${response.status}`)}return response.json() as Promise<User>}interface User {
id: number;
name: string;
email: string;
isActive: boolean;
}
async function fetchUser(userId: number): Promise<User> {
const response = await fetch(`/api/users/${userId}`);
if (!response.ok) {
throw new Error(`HTTP ${response.status}`);
}
return response.json() as Promise<User>;
}Common Use Cases
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Reading minified build artifacts
TypeScript declaration files and bundled output are often single-line. Paste the .ts source into the formatter to recover a readable version you can review, debug, or copy from.
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Reviewing auto-generated TypeScript
Code generators for ORMs, API clients, and gRPC stubs often produce syntactically correct but densely formatted TypeScript. Format it first to make a meaningful code review possible.
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Normalising code copied from documentation
README files and Stack Overflow answers frequently strip indentation when you copy them. Paste into the formatter to restore proper block structure before dropping the snippet into your project.
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Comparing two versions of a TypeScript file
Run both versions through the formatter with the same indentation setting before diffing them, so differences in logic stand out rather than differences in whitespace.
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Preparing TypeScript for embedding in articles or documentation
Use the Minify mode to produce a compact, comment-free version of a TypeScript snippet intended for embedding in a blog post, documentation site, or inline configuration string.