#195 · Frontend Framework Tools Developer Tool

React Formatter

Format JSX or TSX into a cleaner, more consistent layout while preserving code content and providing before-and-after statistics.

Developer Input

React component, Hook, or snippet

React JSX or TSX source

export default function Card({title}){return <section className="card"><h2>{title}</h2><button onClick={()=>alert(title)}>Open</button></section>}

Quote style

Indent size

spaces

Trim whitespace Preserve multiple empty lines Enable strict analysis Auto-run while typing

How to use this developer tool

Paste or enter the React source or specification.
Select the processing mode and configure the secondary option.
Run the tool and review the generated output, statistics, and practical notes.
Copy the result or download it for use in a project.

What this developer tool does

Format React JSX and TSX with configurable indentation, quote normalization, semicolons, tag layout, and before-after output statistics.

Normalize source → tokenize common React patterns → apply the selected transformation or analysis → calculate metrics → generate copy-ready output and recommendations.

The tool runs locally in the browser with deterministic JavaScript. It does not install dependencies, execute a React build, or replace TypeScript, ESLint, or framework tests.

Example

Use the included sample, run the tool, and compare the source with the generated report or transformed code. The sample is intentionally small enough to verify manually.

Tips for better output

Process one component at a time for the clearest line references.
Review generated code before committing it.
Use a project compiler and linter as the final authority.

FAQ

How do I use React Formatter with JSX or TSX online?

Paste JSX or TSX, choose the relevant mode, and run React Formatter. The result is generated entirely in the browser.

Does React Formatter upload React source code to a server?

No. The included implementation processes the source in the current browser session.

Can React Formatter process React 19 components?

Yes for the supported source patterns. Select or enter React 19 where available, then verify the result with your project toolchain.

Can I copy and download the React Formatter result?

Yes. The output card provides copy and download controls after processing.

Does React Formatter replace ESLint or TypeScript?

No. It provides a fast deterministic review or transformation, while ESLint, TypeScript, and build tests remain authoritative.

Related developer tools

React Checker React Generator React Converter React Parser

Supported React analysis

Area	Support
Source	JSX and TSX patterns
Structure	components, Hooks, props, imports
Quality	syntax, accessibility, maintainability

Browse more developer tools

Calldeveloper category hub

Browse Frontend Framework Tools