JSX / React Formatter
Validate, format, minify, and explore JSX components — with React-specific linting, strict syntax checking, and symbol navigation.
Key Features
React Component Spacing
Format your React components using a formatting engine designed specifically for React template layouts. The editor handles HTML-style tags alongside inline JavaScript expressions, ensuring proper tag wrapping, curly bracket alignment, and self-closing tags (such as inputs and image tags) to follow correct React guidelines. It cleans up component structures recursively to maintain layout rules and ensure elements compile properly without tag errors, keeping files highly readable.
Component Tree Explorer
Inspect complex nested structures with our visual component tree. The tool reads your tags to build an interactive nesting map, helping you explore parent and child components, check tag attributes, and locate styling wrappers. The tree explorer maps layouts, listing properties and sub-elements to provide a visual overview of how your templates are structured, speeding up design reviews.
Tailwind Attribute Sorting
Keep utility-first styling classes readable. The formatter handles class and class name fields, sorting and wrapping long styling class lists to fit your width settings. This prevents long utility lists from extending past the viewport edge of your screen. It structures responsive options, hover states, and custom combinations to ensure styling configurations remain organized and easy to maintain.
Embedded Logic Spacing
Ensure consistency in curly braces expressions. The formatting engine applies indentation rules, spacing configurations, quotes, and semicolon alignments to event handlers, callback expressions, and variables nested inside elements. It processes nested arrow functions, array maps, and conditional statements, keeping logic blocks clean and structured.
Real-Time Error Spotting
Identify unclosed tags, missing variables, and formatting errors as you write. The diagnostics checker highlights problematic lines and lists errors, pointing you to issues before compilation. It checks tag balance, quotes format, brace pairs, and variable definitions, helping developers troubleshoot component layouts in real-time.
Compress Code Safely
Compress React templates for testing. Strip out comments, extra spacing, and formatting line breaks while maintaining element logic, helping you compile minimized components for staging environments. The minification tool removes unnecessary spaces and line breaks while keeping hooks, event handlers, and conditional render operations working.
Local-First Code Privacy
Your components and code logic remain completely secure. All formatting, tree mapping, and validation logic runs locally inside your browser sandbox. Code fragments and proprietary logic are never transmitted over the internet, protecting developers from leaks of API parameters, access tokens, or business algorithms when editing components.
Project Indentation Presets
Match your team's code rules. Choose single or double quotes, toggle trailing commas in arrays, set space indent sizes, customize line wrap limits, and configure semicolon preferences in the options toolbar. These presets ensure styling consistency across team repositories, matching project specifications automatically.
Usage Examples
const Card = ({title,text}) => {return (<div className="card"><h3>{title}</h3><p className="muted">{text}</p><button onClick={()=>alert('click')}>Ok</button></div>)}const Card = ({ title, text }) => {
return (
<div className="card">
<h3>{title}</h3>
<p className="muted">{text}</p>
<button onClick={() => alert('click')}>Ok</button>
</div>
);
};Common Use Cases
Refactoring Component Libraries
Maintain consistency when refactoring UI components or creating design systems. Format spacing, quotes, JSX brackets, and attributes across files, creating clean git logs and readable, standard templates. By formatting components consistently, teams can avoid style divergences, review structural layout alterations efficiently, and keep component configurations uniform across project files without manual adjustments.
Fixing Complex Nesting Typos
Paste complex layouts into the editor to locate unclosed divs, mismatched elements, or scoping bugs. The parser flags structural errors, allowing you to fix layouts before launching dev builds. It helps resolve unclosed JSX tags, misplaced braces, and parameter typos, making code troubleshooting simple and fast during complex layout design refactoring.
Formatting Nested Event Handlers
Align complex JavaScript statements inside React component expressions. Standardize spacing around arrow functions, conditional ternary checks, and object mappings within component attributes. This ensures callback logs, state updates, and logic blocks match coding guidelines and remain easy for other developers to inspect and edit.
How It Works
Load JSX Snippet
Paste code into the workspace, load local components, or import snippets. The tool initializes text buffers and starts syntax checks. The editor structures characters and parses component declarations to configure the layout view.
Analyze Component Tree
The parser analyzes elements, inline variables, and braces to build a JSX AST. Syntax errors are flagged immediately with line details. It identifies layout hierarchy, checks tag validation parameters, and structures variable maps.
Apply Spacing Rules
Select preferences like tabs, quotes, className formats, element wrapping limits, and code minification. The engine applies these styles to the component code, organizing braces and formatting attributes based on presets.
Output and Stats
Copy output to the clipboard, download clean files, or review statistics (total elements, nesting levels, properties count) in the stats tab. All calculations run locally in the browser sandbox, keeping component logic private.
Frequently Asked Questions
JSX requires special element parsing rules because it mixes JavaScript logic with HTML tags. While standard JavaScript formatters might flag elements (like <div>) as syntax errors, JSX formatters understand tags, component attributes, self-closing structures, and embedded expressions, applying clean styling rules without breaking React compile processes. It parses element constraints and logical scopes to ensure formatting is fully React-compliant.
Yes. The formatter handles React Hooks syntax (useState, useEffect, useMemo, etc.), structuring variable declarations, array destructuring, dependency arrays, and inline callbacks, ensuring code formatting standards are met. It organizes hook parameters and ensures return states match indentation guidelines.
The formatter keeps class names structured inside element attributes. It wraps long className lists based on line length preferences, avoiding long horizontal text lists and keeping responsive rules readable. This ensures class lists are styled logically and component files remain clean.
This tool is designed for React JSX component files. If your files contain TypeScript definitions (generic types, interfaces, or type casts), some structures might flag syntax warnings. We recommend converting files using the JS to TS tool or formatting pure components. It organizes standard layout markup and function scopes cleanly.
Yes. The formatter evaluates the syntax tree of your code, ensuring that spacing changes do not alter your application logic. It leaves variable names, hook logic, conditional renders, and event logic completely intact, only clean spaces, line breaks, and indentation are modified.
Yes, once loaded, the JSX Formatter is fully functional without internet access. All parsing, checking, formatting, and file exports are executed inside your browser memory on your device, ensuring maximum speeds and keeping your code private.
React applications are made of multiple small components that are nested inside each other. If your JSX code is messy and not indented correctly, it becomes extremely difficult to see where one component ends and another begins. Formatting makes your element hierarchy clear and helps you spot layout bugs quickly.
In standard HTML, some tags do not need a closing tag (like img or input). In JSX, all tags must be closed. Self-closing tags are tags that close themselves with a slash at the end (like `<img src="image.png" />`). The tool automatically adds these slashes during formatting to prevent compilation errors.
Yes. You can set the maximum line width in the settings panel. If a line of JSX code exceeds this length, the formatter will wrap the tag attributes or text onto new lines automatically, keeping your code easy to read without having to scroll horizontally in your editor.
No. The formatting engine only cleans up spacing and lines around your variables and functions inside the curly braces. It does not alter your JavaScript calculations or logic in any way, ensuring that your component continues to work exactly as expected.