Kotlin Formatter
Format and beautify Kotlin code with consistent indentation and clean structure
Kotlin Formatting Tips
- Use 4-space indentation as recommended by the Kotlin coding conventions.
- Place opening braces on the same line for functions and classes.
- Use trailing commas in multi-line collections and parameter lists for cleaner diffs.
Professional Kotlin Processing Features
Everything you need to work with Kotlin data efficiently and professionally
Syntax Validation
Detect unclosed braces, brackets, and parentheses with precise error reporting for Kotlin code.
Beautify Kotlin Code
Transform messy Kotlin code into clean, consistently indented code following Kotlin coding conventions.
DSL Formatting
Properly format DSL builders, scope functions, and trailing lambda expressions with clean indentation.
Composable Support
Correctly format Jetpack Compose composable functions with nested modifiers and layouts.
Fast Processing
Format Kotlin files up to 10MB instantly with client-side processing, no server round-trips needed.
Smart Indentation
Intelligent indentation for data classes, sealed classes, objects, and extension functions.
How It Works
Simple steps to process your Kotlin like a pro
Paste Your Kotlin Code
Paste your Kotlin 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 Kotlin 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 Kotlin Formatter & Validator
Trusted by millions of developers worldwide for reliable Kotlin processing
Built by Experts
Our Kotlin formatter is developed by experienced Android engineers with deep expertise in Kotlin language features. Built to handle modern Kotlin syntax including coroutines and DSLs, it delivers professional results every time.
Key Technical Features:
- • Kotlin syntax-aware parsing with brace matching
- • Support for Kotlin 2.0 features including context parameters
- • Intelligent indentation for DSL blocks and scope functions
- • Client-side processing for maximum security and speed
- • Support for large files up to 10MB
Trusted & Secure
Trusted by Android developers at Fortune 500 companies and startups worldwide. Our commitment to privacy means your Kotlin 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 Kotlin formatter for their daily development workflow. No registration required, completely free, and built with privacy in mind.
Frequently Asked Questions
Common questions about Kotlin Formatter formatting answered
Yes, our Kotlin formatter is completely free with no registration required. All processing happens in your browser.
Yes, our formatter properly handles Jetpack Compose composable functions with consistent indentation.
Yes, it correctly formats coroutine builders, suspend functions, and Flow chains with proper indentation.
No. The formatter only adjusts whitespace and indentation. It never modifies identifiers, types, or logic.
It follows the official Kotlin coding conventions with 4-space indentation and consistent brace placement.