Three simple steps
How to use this tool?
This free online converter translates Swift source code into C in three simple steps.
- Step 1
Add your Swift code
Type, paste, or upload the Swift 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 Swift to C conversion
These examples show Swift 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.
Swift code
C code
Example 2
Even or Odd
A well commented function to check if a number if odd or even.
Swift code
C code
Language comparison
Key differences between Swift and C
| Characteristic | Swift | C |
|---|---|---|
| Syntax | Swift has a more concise and expressive syntax compared to C. | C has a more verbose and low-level syntax compared to Swift. |
| Paradigm | Swift is a multi-paradigm language that supports both object-oriented and functional programming. | C is a procedural programming language. |
| Typing | Swift is a strongly typed language with type inference. | C is a weakly typed language. |
| Performance | Swift is designed to be fast and efficient, with performance comparable to C. | C is known for its high performance and low-level control. |
| Libraries and frameworks | Swift has a growing ecosystem of libraries and frameworks, but it may have fewer options compared to C. | C has a vast collection of libraries and frameworks available. |
| Community and support | Swift has a large and active community with good support from Apple. | C has a long-standing community and wide support. |
| Learning curve | Swift has a relatively low learning curve, especially for developers familiar with modern programming languages. | C has a steeper learning curve, especially for beginners. |
Common questions
Frequently Asked Questions
How do I convert Swift to C?
Paste your Swift code into the input box, confirm the languages are set to Swift and C, and click Convert. CodeConvert AI analyzes your Swift code and generates equivalent C code in seconds, preserving the original logic and structure.
What are the main differences between Swift and C?
Swift 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 Swift construct to its closest C equivalent. See the comparison table below for the key differences between Swift and C.
Is the converted C code accurate?
The AI produces high-quality C code that preserves the behavior of your original Swift code and follows C conventions. It handles common patterns, data structures, and idioms for both Swift and C. For large or performance-critical code, review and test the C output before using it in production.
Can I convert an entire Swift project to C?
You can convert Swift 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 Swift 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 Swift?
Yes. CodeConvert AI converts in both directions, so you can convert C to Swift just as easily using our C to Swift converter. Try the C to Swift Converter
Is the Swift 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 Swift to C 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.
More free tools