Three simple steps
How to use this tool?
This free online converter translates Objective-C source code into Kotlin in three simple steps.
- Step 1
Add your Objective-C code
Type, paste, or upload the Objective-C 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 Objective-C to Kotlin conversion
These examples show Objective-C 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.
Objective-C code
Kotlin code
Example 2
Even or Odd
A well commented function to check if a number if odd or even.
Objective-C code
Kotlin code
Language comparison
Key differences between Objective-C and Kotlin
| Characteristic | Objective-C | Kotlin |
|---|---|---|
| Syntax | Objective-C uses a syntax similar to C with added Smalltalk-style messaging syntax. | Kotlin has a more modern and concise syntax compared to Objective-C. |
| Paradigm | Objective-C is primarily an object-oriented programming language with support for procedural programming. | Kotlin is a statically-typed programming language that supports both object-oriented and functional programming paradigms. |
| Typing | Objective-C is a dynamically-typed language. | Kotlin is a statically-typed language. |
| Performance | Objective-C has good performance due to its low-level nature and direct access to C libraries. | Kotlin has comparable performance to Java as it runs on the Java Virtual Machine (JVM). |
| Libraries and frameworks | Objective-C has a rich set of libraries and frameworks, especially for iOS and macOS development. | Kotlin has access to the vast ecosystem of Java libraries and frameworks. |
| Community and support | Objective-C has a large community and good support, especially for iOS and macOS development. | Kotlin has a growing community and good support, especially for Android development. |
| Learning curve | Objective-C has a steeper learning curve compared to Kotlin due to its complex syntax and memory management. | Kotlin has a relatively easier learning curve compared to Objective-C. |
Common questions
Frequently Asked Questions
How do I convert Objective-C to Kotlin?
Paste your Objective-C code into the input box, confirm the languages are set to Objective-C and Kotlin, and click Convert. CodeConvert AI analyzes your Objective-C code and generates equivalent Kotlin code in seconds, preserving the original logic and structure.
What are the main differences between Objective-C and Kotlin?
Objective-C 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 Objective-C construct to its closest Kotlin equivalent. See the comparison table below for the key differences between Objective-C and Kotlin.
Is the converted Kotlin code accurate?
The AI produces high-quality Kotlin code that preserves the behavior of your original Objective-C code and follows Kotlin conventions. It handles common patterns, data structures, and idioms for both Objective-C and Kotlin. For large or performance-critical code, review and test the Kotlin output before using it in production.
Can I convert an entire Objective-C project to Kotlin?
You can convert Objective-C 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 Objective-C 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 Objective-C?
Yes. CodeConvert AI converts in both directions, so you can convert Kotlin to Objective-C just as easily using our Kotlin to Objective-C converter. Try the Kotlin to Objective-C Converter
Is the Objective-C 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 Objective-C to Kotlin without an account for up to 2 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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