Dart Formatter
Format and beautify Dart code following Dart style guidelines
Dart Formatting Tips
- Follow the official Dart style guide: use trailing commas for better formatting of parameter lists.
- Use 2-space indentation as recommended by the Dart style guide.
- Prefer single quotes for strings unless interpolation is needed, then use double quotes.
Professional Dart Processing Features
Everything you need to work with Dart data efficiently and professionally
Syntax Validation
Detect unclosed braces, brackets, and parentheses with precise error reporting for Dart code.
Beautify Dart Code
Transform messy Dart code into clean, consistently indented code following the Dart style guide.
Widget Formatting
Properly format deeply nested Flutter widget trees with readable indentation and trailing commas.
Async/Await Handling
Correctly format async functions, Future chains, and Stream operations with proper alignment.
Fast Processing
Format Dart files up to 10MB instantly with client-side processing, no server round-trips needed.
Smart Indentation
Intelligent indentation for classes, mixins, extensions, and enum declarations.
How It Works
Simple steps to process your Dart like a pro
Paste Your Dart Code
Paste your Dart source code into the input area, or load a sample to get started.
Customize Options
Choose indentation size to match your project conventions.
Format & Review
Click the format button to beautify your Dart code and review the clean output.
Copy or Download
Copy the formatted code to your clipboard or download it as a file for your project.
Professional Dart Formatter & Validator
Trusted by millions of developers worldwide for reliable Dart processing
Built by Experts
Our Dart formatter is developed by experienced Flutter engineers with deep expertise in Dart language features. Built to handle modern Dart syntax including null safety, it delivers professional results every time.
Key Technical Features:
- • Dart syntax-aware parsing with brace matching
- • Support for Dart 3 features including records and patterns
- • Intelligent indentation for widgets and nested expressions
- • Client-side processing for maximum security and speed
- • Support for large files up to 10MB
Trusted & Secure
Trusted by Flutter developers at Fortune 500 companies and startups worldwide. Our commitment to privacy means your Dart code never leaves your browser.
Security & Privacy:
- • 100% client-side processing - data never sent to servers
- • No tracking, cookies or data collection
- • HTTPS encryption for secure connections
- • No data stored or cached after processing
- • GDPR and CCPA compliant approach
Why Professionals Choose EZ Formatter
Join millions of developers who trust our Dart formatter for their daily development workflow. No registration required, completely free, and built with privacy in mind.
Frequently Asked Questions
Common questions about Dart Formatter formatting answered
Yes, our Dart formatter is completely free with no registration required. All processing happens in your browser.
Yes, our formatter properly handles deeply nested Flutter widget trees with consistent indentation and trailing commas.
Yes, it supports modern Dart features including records, patterns, sealed classes, and class modifiers.
No. The formatter only adjusts whitespace and indentation. It never modifies identifiers, types, or logic.
By default, it follows the official Dart style guide with 2-space indentation, consistent spacing, and proper line breaking.