Three simple steps
How to use this tool?
This free online converter translates Groovy source code into Kotlin in three simple steps.
- Step 1
Add your Groovy code
Type, paste, or upload the Groovy code you want to translate.
- Step 2
Convert the code
Click Convert to translate the source code into Kotlin.
- Step 3
Review the result
Review, copy, or download the resulting Kotlin code from the output editor.
See it in action
Examples of Groovy to Kotlin conversion
These examples show Groovy source code and the corresponding Kotlin 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.
Groovy code
Kotlin code
Example 2
Even or Odd
A well commented function to check if a number if odd or even.
Groovy code
Kotlin code
Language comparison
Key differences between Groovy and Kotlin
| Characteristic | Groovy | Kotlin |
|---|---|---|
| Syntax | Groovy has a syntax similar to Java with additional features like closures and dynamic typing. | Kotlin has a more concise and expressive syntax compared to Java and supports features like null safety and extension functions. |
| Paradigm | Groovy is a dynamic language that supports both object-oriented and functional programming paradigms. | Kotlin is a statically-typed language that supports both object-oriented and functional programming paradigms. |
| Typing | Groovy is dynamically typed, allowing for flexible and concise code. | Kotlin is statically typed, providing compile-time type safety and null safety. |
| Performance | Groovy is slower than Java due to its dynamic nature and runtime metaprogramming. | Kotlin has similar performance to Java as it compiles to JVM bytecode. |
| Libraries and frameworks | Groovy has good integration with Java libraries and frameworks. | Kotlin has good interoperability with Java libraries and frameworks and also provides its own set of libraries. |
| Community and support | Groovy has an active community and good support from its developers. | Kotlin has a growing community and is backed by JetBrains, which provides strong support. |
| Learning curve | Groovy has a relatively low learning curve for Java developers due to its similarity to Java. | Kotlin has a moderate learning curve for Java developers, but its concise syntax and modern features make it easier to learn. |
Common questions
Frequently Asked Questions
How do I convert Groovy to Kotlin?
Paste your Groovy code into the input box, confirm the languages are set to Groovy and Kotlin, and click Convert. CodeConvert AI analyzes your Groovy code and generates equivalent Kotlin code in seconds, preserving the original logic and structure.
What are the main differences between Groovy and Kotlin?
Groovy and Kotlin differ in syntax, type system, standard libraries, and common idioms, so copying code line for line usually will not compile. The converter maps each Groovy construct to its closest Kotlin equivalent. See the comparison table below for the key differences between Groovy and Kotlin.
Is the converted Kotlin code accurate?
The AI produces high-quality Kotlin code that preserves the behavior of your original Groovy code and follows Kotlin conventions. It handles common patterns, data structures, and idioms for both Groovy and Kotlin. For large or performance-critical code, review and test the Kotlin output before using it in production.
Can I convert an entire Groovy project to Kotlin?
You can convert Groovy 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 Groovy to Kotlin. Signing in for free raises the input limit to 25,000 characters per conversion for larger files.
Can I convert Kotlin back to Groovy?
Yes. CodeConvert AI converts in both directions, so you can convert Kotlin to Groovy just as easily using our Kotlin to Groovy converter. Try the Kotlin to Groovy Converter
Is the Groovy to Kotlin 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 Groovy to Kotlin 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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