Three simple steps
How to use this tool?
This free online converter translates Kotlin source code into C# in three simple steps.
- Step 1
Add your Kotlin code
Type, paste, or upload the Kotlin code you want to translate.
- Step 2
Convert the code
Click Convert to translate the source code into C#.
- Step 3
Review the result
Review, copy, or download the resulting C# code from the output editor.
See it in action
Examples of Kotlin to C# conversion
These examples show Kotlin source code and the corresponding C# translation. Generated results can vary as AI models are updated.
Example 1
Is String Palindrome
Program that checks if a string is a palindrome or not.
Kotlin code
C# code
Example 2
Even or Odd
A well commented function to check if a number if odd or even.
Kotlin code
C# code
Language comparison
Key differences between Kotlin and C#
| Characteristic | Kotlin | C# |
|---|---|---|
| Syntax | Kotlin has a concise and expressive syntax that is similar to Java but with some added features such as null safety and extension functions. | C# has a syntax that is similar to Java and C++, but with some added features such as LINQ and async/await. |
| Paradigm | Kotlin is a multi-paradigm language that supports both object-oriented and functional programming. | C# is a multi-paradigm language that supports object-oriented, functional, and imperative programming. |
| Typing | Kotlin is a statically typed language that supports type inference. | C# is a statically typed language that supports type inference. |
| Performance | Kotlin is a relatively fast language that can be compiled to native code or run on the JVM. | C# is a relatively fast language that can be compiled to native code or run on the .NET runtime. |
| Libraries and frameworks | Kotlin has a growing ecosystem of libraries and frameworks, including Spring Boot and Ktor. | C# has a large ecosystem of libraries and frameworks, including .NET Core and ASP.NET. |
| Community and support | Kotlin has a growing community and is supported by JetBrains, the company that created it. | C# has a large community and is supported by Microsoft, the company that created it. |
| Learning curve | Kotlin has a relatively easy learning curve for developers who are familiar with Java or other object-oriented languages. | C# has a relatively easy learning curve for developers who are familiar with Java or other object-oriented languages. |
Common questions
Frequently Asked Questions
How do I convert Kotlin to C#?
Paste your Kotlin code into the input box, confirm the languages are set to Kotlin and C#, and click Convert. CodeConvert AI analyzes your Kotlin code and generates equivalent C# code in seconds, preserving the original logic and structure.
What are the main differences between Kotlin and C#?
Kotlin and C# differ in syntax, type system, standard libraries, and common idioms, so copying code line for line usually will not compile. The converter maps each Kotlin construct to its closest C# equivalent. See the comparison table below for the key differences between Kotlin and C#.
Is the converted C# code accurate?
The AI produces high-quality C# code that preserves the behavior of your original Kotlin code and follows C# conventions. It handles common patterns, data structures, and idioms for both Kotlin and C#. For large or performance-critical code, review and test the C# output before using it in production.
Can I convert an entire Kotlin project to C#?
You can convert Kotlin files one at a time by pasting each file's code. For a full migration, convert each file and then review how classes, dependencies, and project structure map from Kotlin to C#. Signing in for free raises the input limit to 25,000 characters per conversion for larger files.
Can I convert C# back to Kotlin?
Yes. CodeConvert AI converts in both directions, so you can convert C# to Kotlin just as easily using our C# to Kotlin converter. Try the C# to Kotlin Converter
Is the Kotlin to C# converter free, and do I need to install anything?
Yes, it is free and runs in your browser with nothing to install and no IDE extension required. You can convert Kotlin to C# without an account for up to 5 conversions per day. Sign in for free for higher limits.
What are the benefits of signing in?
Signing in unlocks CodeConvert AI's Pro converter with more powerful AI models, a built-in chat assistant, code execution, saved conversion history, and personal notes. Every free account includes 5 credits and supports up to 25,000 characters of input per conversion, with no credit card required.
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