Format and beautify JavaScript code. Fast, secure, and completely free. All processing happens in your browser — no data is sent to any server.
A JavaScript Formatter re-indents and re-spaces JS or TypeScript-flavored code so its structure — function bodies, object literals, chained method calls — is visually consistent, without changing what the code does. It's the same idea behind tools like Prettier: parsing the source into an understanding of its syntax, then printing it back out with a consistent style for braces, spacing, and line breaks. This is especially useful for code that arrives already minified or written inconsistently — pasted from a bundler's output, extracted from a browser's dev tools, or copied from a Slack message where formatting got mangled.
Reading someone else's minified or inconsistently formatted JavaScript — whether it's a bundled vendor script you're debugging in production, a snippet copied out of an old Stack Overflow answer, or code a teammate wrote without running a formatter — slows down every review and every debugging session. Reformatting first turns a dense block of code into something with visible structure, so you can actually follow the control flow instead of scanning for matching braces.
No — only whitespace, indentation, and line breaks change. Identifiers, values, and execution order stay exactly as written.
Common TypeScript syntax formats correctly for readability purposes; for full type-checking or advanced TS-specific formatting rules, a dedicated TS-aware formatter in your IDE is more precise.
Basic JSX structures format reasonably, but deeply nested component trees with mixed expressions are best handled by an IDE-integrated formatter that understands JSX fully.
No, it only reformats code for readability. Use a linter (ESLint) separately to catch unused variables, unreachable code, or other issues.
No, formatting is done locally in your browser, so proprietary or pre-release code never leaves your machine.