Kotlin Formatter — Clean Code Indenter
Format Kotlin code instantly in your browser. Fix indentation, enforce opening-brace-on-same-line style, and add trailing commas to function parameters and class bodies — no server required.
How to Use Kotlin Formatter — Clean Code Indenter
How to Use the Kotlin Formatter
Step 1: Paste Your Kotlin Code
Paste or type your Kotlin code into the input field on the left.
Step 2: Choose Indent Size
Select how many spaces to use per indentation level:
- 4 spaces — The Kotlin coding conventions default
- 2 spaces — Compact style used in some projects
Step 3: Copy the Result
The formatted output appears instantly on the right. Click Copy Formatted to copy it to your clipboard.
What Gets Formatted
- Space indentation — All indentation is replaced with spaces at the selected size, with level tracked by
{/}and(/)braces - Brace on same line — A standalone
{on its own line is merged onto the end of the preceding line (Kotlin style guide) - Trailing commas — The last parameter in a function signature and the last property in a data class automatically receive a trailing comma if missing
Tips
- Use the example buttons to test with real Kotlin snippets
- The formatter handles common patterns; for production code use
ktlintorIntelliJ IDEAformatting directly
Frequently Asked Questions
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