Does it support TypeScript?

Yes. The tool formats both JavaScript and TypeScript using Prettier's TypeScript parser. Type annotations, generics, and interfaces are handled correctly.

Can I configure the formatting style?

Yes. Options include: indent size (2 or 4 spaces vs tabs), single vs double quotes, trailing comma style, and semicolons on/off.

JavaScript Formatter

Formats JavaScript code using Prettier — the industry-standard JS/TS formatter. Corrects indentation, adds missing semicolons, normalises quote styles, sorts object keys, and ensures consistent spacing. Supports modern JavaScript including ES2024 syntax, arrow functions, async/await, destructuring, and optional chaining.

Indent

Quotes

Semicolons

JavaScript input

Formatted JavaScript

Paste your JavaScript and get properly formatted output — configure indent size and quote style.

Frequently Asked Questions

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