About the React Formatter
What is a React formatter?
React components mix two languages in one file: JavaScript logic and JSX markup. That mix is exactly what breaks naive formatters — a < can be a comparison or the start of a tag. This tool formats the JavaScript around your components properly — hooks, props destructuring, arrow handlers, imports — while treating JSX blocks as protected regions that are never mangled: your tags, attributes, and embedded expressions come out exactly as you wrote them.
That design choice is deliberate. Half-formatted JSX with broken tags is worse than untouched JSX, so this tool guarantees the safe half and does it entirely offline: the js-beautify engine is bundled locally with the page, nothing is fetched from a CDN, and your code never leaves the browser.
How to Use This Tool
- Add your component. Paste JSX/TSX into the left editor, open a file, or click Sample.
- Watch it format. The JavaScript structure — functions, hooks, handlers — is indented live while JSX markup passes through untouched.
- Tune the style. Choose indentation, brace placement, and blank-line handling.
- Take the result. Copy it or download it as a
.jsxfile.
Common Use Cases
- Cleaning up component logic: Untangle the hooks, handlers, and helpers around your render output.
- Reading pasted components: Make single-line snippets from chat or docs reviewable.
- Normalizing style: Convert a component's indentation and brace style in one pass.
- Safe by default: Format files where you absolutely cannot afford a broken tag.
Plain JavaScript? Use the JavaScript Formatter. Typed code? The TypeScript Formatter. Standalone markup? The HTML Formatter.
Frequently Asked Questions
Will it break my JSX?
No — that is the core guarantee. JSX blocks are detected and passed through byte-for-byte, so tags, attributes, spreads, and embedded expressions are never restructured. Only the JavaScript around them is formatted.
Why is my JSX markup not re-indented?
By design. Reformatting JSX safely requires a full Babel-grade parser; tokenizer-based approaches are notorious for producing broken tags. This tool chooses the safe contract: perfect formatting for the JavaScript, perfect preservation for the markup.
Does it work with hooks and modern React?
Yes. useState/useEffect and custom hooks, destructured props with defaults, arrow-function handlers, fragments, and ES module imports/exports all format correctly.
Can I format TSX?
Yes — paste it in. TypeScript syntax outside the JSX formats the same way it does in the TypeScript Formatter, and the JSX itself is preserved untouched.
What happens with broken code?
The tokenizer-based engine never rejects input: incomplete components get best-effort formatting rather than an error message, which is convenient mid-edit.
Is my code uploaded anywhere?
No. The formatting library ships with the page and runs locally — no CDN, no uploads, no logging — and the tool works offline once loaded.