How do I format code on this page?
Paste code into the left editor or load a file, choose the options you need, and select Format. Review the result on the right, then copy or save it.
Kotlin Formatter is an online tool that helps you beautify and format your Kotlin code. It automatically handles indentation, aligns code elements, and inserts appropriate spaces and line breaks to improve readability and maintainability. With Kotlin Formatter, you can eliminate the repetitive work of manually adjusting code layout, saving both time and effort. In addition, Kotlin Formatter supports customizable formatting styles and settings to match your personal preferences and team conventions.
Paste code into the left editor or load a file, choose the options you need, and select Format. Review the result on the right, then copy or save it.
The input must match the selected language or syntax. Check incomplete statements, unmatched brackets or quotes, and a dialect or mode that does not match the input, then format again.
A code formatter reads language-aware tokens and nested structures, then rewrites indentation, spacing, and line breaks according to a consistent rule set. It does not compile or run the program, so formatting is not a correctness or security check.
Start with the official Kotlin style, 4 spaces, and the page default of 120 columns; do not use tabs for indentation. Choose the official Kotlin, IntelliJ IDEA, or Android Studio style, then set the indent width and column limit.