Online Code Beautifier
Professional code formatting tool with real-time preview, custom settings, and team collaboration support
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Professional code formatting tool with real-time preview, custom settings, and team collaboration support
Loading development tool...
Paste or type code to beautify
Format your code to view the result here
Format JavaScript, TypeScript, HTML, CSS, and JSON instantly in your browser. No installation required.
Everything you need for professional code formatting
Format JavaScript (ES5/ES6+, JSX), TypeScript (TSX), HTML, CSS, and JSON
See formatting changes instantly as you type with live preview
Advanced code highlighting for better readability
Configure indentation, semicolons, quotes, line width, and more
Upload and format multiple files simultaneously
Share formatting rules across your team
Choose from Standard, Airbnb, Google style guides
Export configurations for GitHub Actions and other pipelines
Enforce uniform formatting standards organization-wide
No installation required - works entirely in your browser
Simple file upload via drag-and-drop interface
Fast formatting with Ctrl+Alt+F and other shortcuts
Fully responsive design for tablets and smartphones
Eye-friendly interface with automatic dark mode support
All formatting happens in your browser - code never leaves your device
Your code remains 100% private and secure
Instant formatting for files up to 2MB
Optimized performance with intelligent result caching
Get started with code beautification in 4 simple steps
how to format javascript code online free: This tool is perfect for beginners who want to quickly format code without installing any software - just paste and format directly in your browser.
prettier online tool with custom settings: The visual configuration panel lets you easily customize formatting rules to match your personal or team preferences.
free code formatter for html and css: Batch upload functionality allows web developers to efficiently process multiple HTML and CSS files. online json prettifier with validation: JSON files are automatically validated during export.
how to beautify code in browser without install: No browser extensions needed - achieve instant code beautification directly on the webpage.
| Shortcut | Function | Description |
|---|---|---|
| Ctrl + Alt + F | Format Code | Instantly format current code |
| Ctrl + Z | Undo | Undo last operation |
| Ctrl + Y | Redo | Redo undone operation |
| Ctrl + S | Save | Download formatted code |
| Ctrl + O | Open | Open file selector |
| Ctrl + C | Copy | Copy selected code |
| Ctrl + V | Paste | Paste clipboard content |
Add semicolons at the end of statements
Use single quotes instead of double quotes
Add trailing commas in multi-line structures
Add spaces inside object literal braces
Add parentheses around single-parameter arrow functions
Indentation size for HTML tags
Automatically wrap long attributes to new lines
Use self-closing format for empty tags (<br />)
Add newline at end of file
Place opening brace on same line as selector
Real-world success stories from teams using our code beautifier
Teams can quickly unify standards through import/export configuration, avoiding style conflicts.
real-time code formatting preview online: Real-time preview helps teams instantly verify configuration effectiveness.
Teachers can batch format TypeScript assignments ensuring teaching consistency.
mobile friendly code beautifier app: Mobile support allows teachers to process assignments anytime, anywhere.
Open source contributors export configurations to ensure PRs meet project standards.
| Scenario Type | Primary Value | Recommended Configuration |
|---|---|---|
| Team Collaboration | Unify code style, improve collaboration efficiency | Strict config, enforce semicolons |
| Education & Training | Help learners develop good coding habits | Education-friendly, clear indentation |
| Open Source Projects | Lower contribution barrier, improve code quality | Standard config, strong compatibility |
| Enterprise Applications | Improve code maintainability and readability | Enterprise standard, strict rules |
Everything you need to know about using our code beautifier
Currently supports: JavaScript (ES5/ES6+, JSX), TypeScript (TSX support), HTML (HTML5, Vue/Angular templates), CSS (CSS3, SCSS, Less), and JSON (Standard JSON, JSON5). Planned support: Python, Java, C++, Go, Rust, PHP.
how to format javascript code online free: JavaScript is the most popular language with free online formatting support.
Single file: Maximum 2MB. Batch processing: Up to 10 files, total size not exceeding 5MB. Recommendation: For very large files, process in segments for better performance.
prettier online tool with custom settings: Custom settings work for large files, ensuring efficient processing.
No! Our formatting process is syntax safe (based on AST parsing), preserves logic completely, retains all comments, and only adjusts code format and style.
free code formatter for html and css: HTML/CSS formatting preserves all functionality.
Configuration automatically saves in local browser. Click 'Export Config' to download configuration file, or 'Import Config' to upload. Configuration files can be shared among team members.
online json prettifier with validation: JSON configuration is automatically validated when saved.
Yes! We provide preset rules (Standard, Airbnb, Google) and you can modify all Prettier-supported options. ESLint rule integration is planned, and future enterprise edition will support completely custom rules.
how to beautify code in browser without install: Customize rules directly in browser without installation.
Yes! Share configurations through files to achieve team standardization. You can share code and configuration via links. Real-time collaboration and version control features are in development.
team code style enforcement tool online: Online tool perfectly supports team collaboration.
Try these optimizations: Break large files into smaller chunks, disable real-time preview in settings, clear browser cache and cookies, and ensure browser has sufficient memory.
real-time code formatting preview online: Disabling preview can speed up processing.
Follow these troubleshooting steps: 1) Check syntax correctness, 2) Confirm correct language type is selected, 3) Try formatting code snippets to locate issue, 4) Refresh page and retry, 5) Report problem through feedback button.
best online code beautifier for typescript: For TypeScript failures, check syntax compatibility.
Yes! Fully compatible with iOS Safari and Android Chrome, with touch-optimized interface and mobile-specific performance optimizations. Some advanced features are simplified on mobile.
mobile friendly code beautifier app: Mobile-friendly design enables use anytime, anywhere.
Absolutely! All formatting happens locally in your browser. Code is never sent to our servers, only temporarily stored in current session, and automatically cleared when page is closed.
export formatted code configuration for teams: Configuration export ensures secure data sharing.
Simply drag and drop multiple files for automatic formatting and export. Perfect for large projects with many files.
free code formatter for html and css: Batch HTML/CSS processing saves time.
Yes! Integrates with GitHub Actions and other tools through API or configuration files for automated code formatting in your deployment pipeline.
team code style enforcement tool online: Online tool easily integrates with CI/CD.
ES5, ES6+, JSX, Node.js
TS, TSX, Type Definitions
HTML5, Vue Templates, Angular Templates
CSS3, SCSS, SASS, Less
JSON, JSON5, JSONC
<50ms
<200ms
<1s
5-10 files/second