TypeScript Formatter
Format and beautify TypeScript with Prettier, live as you type.
Formatted with Prettier, live as you type, entirely in your browser. Nothing you type is sent anywhere.
What is TypeScript Formatter?
Paste TypeScript and get it formatted instantly using Prettier, the same formatter used by most modern JS/TS codebases — consistent indentation, quote style, semicolons, and line breaks, without a build step, a project setup, or installing anything locally. It handles the same syntax full TypeScript projects use, including interfaces, generics, and type annotations, since it runs through Prettier's real TypeScript parser rather than a generic JS formatter. Formatting happens live as you type, and Prettier and its plugins are loaded only on this page (not bundled site-wide), keeping other pages lean. Nothing you paste is sent to a server — parsing and formatting both happen in your browser.
FAQ
No — this only reformats code style (spacing, quotes, line breaks); it doesn't run the TypeScript compiler, so it won't catch type errors.
An error message appears below the fields ('Could not parse that as TypeScript') and the output is left blank until the syntax is fixed.
Not currently — this tool applies Prettier's standard TypeScript formatting rules with no configuration options exposed.