Smart Contract Formatter

Format and beautify your Solidity smart contract code with proper indentation, syntax highlighting, and error detection. All processing is done client-side for maximum security.

Your smart contract code is processed entirely in your browser. No data is sent to external servers, ensuring complete privacy and security.

Input Smart Contract Code

0 characters

Formatted Code 

// Your formatted Solidity code will appear here...

How to Use the Smart Contract Formatter

Paste your Solidity smart contract code into the input textarea. You can input any valid Solidity code including contracts, interfaces, libraries, and more. The formatter supports all Solidity versions from 0.4.x to the latest releases.

Choose your preferred indentation (2, 4, 8 spaces or tabs) and line width (80, 120, or 160 characters). You can also toggle between light and dark themes for better visibility. These settings help ensure your formatted code matches your team's coding standards.

Click the "Format Code" button to beautify your smart contract. The formatted code will appear with proper indentation, spacing, and syntax highlighting. Review the output to ensure it meets your requirements, then copy it to your clipboard.

Frequently Asked Questions

A Smart Contract Formatter is an essential tool for blockchain developers that automatically beautifies and organizes Solidity code. It applies consistent indentation, proper spacing, and formatting rules to make your smart contracts more readable, maintainable, and professional. This is crucial for code reviews, team collaboration, and following industry best practices.

Yes! Our smart contract formatter supports all major Solidity versions from 0.4.x through the latest releases. It recognizes modern Solidity syntax including pragma statements, interfaces, libraries, inheritance, modifiers, events, custom errors, and advanced features like assembly blocks and inline documentation.

Absolutely! Your smart contract code is completely secure. All formatting is performed client-side in your browser using JavaScript - no code is ever sent to external servers or stored anywhere. This ensures complete privacy and security for your valuable smart contract source code, making it safe for even the most sensitive blockchain projects.

Yes, our formatter is optimized for performance and can handle large smart contract files efficiently. It works well with complex contracts that include multiple inheritance, extensive libraries, proxy patterns, and thousands of lines of code. The tool is particularly useful for DeFi protocols, NFT collections, and enterprise blockchain applications.

While our formatter performs basic syntax validation (checking for balanced braces and parentheses), it's primarily designed for code formatting and beautification. For comprehensive error checking, security analysis, and compilation verification, we recommend using development tools like Hardhat, Truffle, or Remix IDE alongside our formatter.

Our formatter follows widely accepted Solidity style guidelines and best practices. It applies consistent indentation, proper spacing around operators and keywords, organized import statements, and clear separation between contract elements. The formatting helps improve code readability for audits, peer reviews, and team collaboration.

What Blockchain Developers Say

"Essential tool for our DeFi protocol development. The syntax highlighting and consistent formatting make code reviews so much easier. Love that it keeps our smart contracts secure client-side!"

Alex Chen, DeFi Protocol Lead

"Perfect for cleaning up legacy smart contracts before audits. The customizable indentation and theme options match perfectly with our team's coding standards. Highly recommended!"

Maria Rodriguez, Smart Contract Auditor

"As an NFT collection developer, I use this daily to ensure my contracts are properly formatted. The real-time character counting and error detection save me tons of time during development."

Kevin Park, NFT Developer

"Incredibly useful for teaching blockchain development. Students can see properly formatted Solidity code with syntax highlighting, making it easier to understand smart contract structure and best practices."

Dr. Sarah Johnson, Blockchain Professor

"Game-changer for our enterprise blockchain solutions. The consistent formatting across our smart contract codebase improves maintainability and makes onboarding new developers much smoother."

James Miller, Enterprise Blockchain Architect

About Smart Contract Code Formatting

Smart contract code formatting is a critical aspect of blockchain development that ensures code readability, maintainability, and professional presentation. Properly formatted Solidity code follows established conventions that make it easier for developers, auditors, and stakeholders to understand complex smart contract logic.

Why Format Your Solidity Code?

Well-formatted smart contracts are essential for professional blockchain development. They improve code readability during security audits, facilitate team collaboration, and help maintain consistent coding standards across large projects. Properly formatted code also reduces the likelihood of introducing bugs and makes debugging more efficient.

Solidity Formatting Best Practices
  • Consistent Indentation: Use consistent spacing (typically 4 spaces) for nested code blocks
  • Function Organization: Group related functions and separate them with appropriate spacing
  • Comment Alignment: Align comments consistently and use NatSpec format for documentation
  • Import Statements: Organize import statements at the top of the file
  • Line Length: Keep lines under a reasonable length (80-120 characters) for better readability
  • Operator Spacing: Add appropriate spaces around operators and after commas
Common Use Cases for Smart Contract Formatting
  • Pre-Audit Preparation: Clean up code before security audits and reviews
  • Team Collaboration: Ensure consistent formatting across development teams
  • Open Source Publishing: Present professional-looking code for GitHub repositories
  • Educational Content: Format code examples for tutorials and documentation
  • Legacy Code Maintenance: Standardize formatting in existing smart contract projects
  • Code Migration: Clean up contracts when upgrading Solidity versions
Supported Solidity Features

Our formatter recognizes and properly handles all modern Solidity constructs including:

  • Contract inheritance and interfaces
  • Libraries and abstract contracts
  • Modifiers and custom errors
  • Events and struct definitions
  • Assembly blocks and low-level calls
  • Pragma statements and import directives
  • Function overloading and visibility specifiers
  • Mapping and array declarations
Security Note: All code formatting happens entirely in your browser. Your smart contract code never leaves your device, ensuring complete privacy and security. This is especially important when working with proprietary or sensitive blockchain applications.
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