Java to Kotlin Converter
Translate a subset of Java — classes, methods, variables, loops, println — into idiomatic Kotlin.
Supported: System.out.println, variable declarations (with var/val), methods, classes, main, C-style and enhanced for loops, and new. Constructors, lambdas, generics, and static members need a manual pass — always review.
About this tool
Translate Java classes, methods, variable declarations, for loops and println into idiomatic Kotlin. Free, client-side, no signup. Java to Kotlin Converter runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.
What this tool does not do
- Java to Kotlin Converter is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.
How do I use this tool?
How do I use Java to Kotlin Converter?
Open Java to Kotlin Converter, enter or paste your input, and copy the result. The page works without an account.
Related guides
Java to Kotlin: A Practical Conversion Guide
How a simple Java class maps to idiomatic Kotlin — println, var/val, fun, and for-in — and where a hand-rolled converter needs a manual review.
C# to VB.NET: Converting Across the .NET Language Divide
How C# braces and types map to VB.NET keyword blocks (Class/End Class, Sub/Function, If...Then/End If) and where you still need to finish by hand.
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