Three simple steps
How to use this tool?
This free online converter translates Swift source code into JavaScript 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 JavaScript.
- Step 3
Review the result
Review, copy, or download the resulting JavaScript code from the output editor.
See it in action
Examples of Swift to JavaScript conversion
These examples show Swift source code and the corresponding JavaScript 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
JavaScript code
Example 2
Even or Odd
A well commented function to check if a number if odd or even.
Swift code
JavaScript code
Language comparison
Key differences between Swift and JavaScript
| Characteristic | Swift | JavaScript |
|---|---|---|
| Syntax | Swift has a syntax that is similar to many other modern programming languages, with a focus on readability and simplicity. | JavaScript has a syntax that is influenced by C and Java, with a focus on flexibility and dynamic typing. |
| Paradigm | Swift is a multi-paradigm language that supports both object-oriented and functional programming. | JavaScript is a multi-paradigm language that supports both object-oriented and functional programming. |
| Typing | Swift is a statically typed language, which means that variable types are checked at compile-time. | JavaScript is a dynamically typed language, which means that variable types are checked at runtime. |
| Performance | Swift is known for its high performance and efficiency, making it suitable for resource-intensive applications. | JavaScript is generally slower than Swift, but its performance can be optimized using various techniques. |
| Libraries and frameworks | Swift has a growing ecosystem of libraries and frameworks, although it may not have as many options as JavaScript. | JavaScript has a vast ecosystem of libraries and frameworks, making it easy to find solutions for various tasks. |
| Community and support | Swift has a strong and growing community, with active support from Apple and other developers. | JavaScript has one of the largest and most active communities, with extensive online resources and support. |
| Learning curve | Swift has a relatively low learning curve, especially for developers familiar with other modern programming languages. | JavaScript has a moderate learning curve, with some complex concepts and quirks that may take time to master. |
Common questions
Frequently Asked Questions
How do I convert Swift to JavaScript?
Paste your Swift code into the input box, confirm the languages are set to Swift and JavaScript, and click Convert. CodeConvert AI analyzes your Swift code and generates equivalent JavaScript code in seconds, preserving the original logic and structure.
What are the main differences between Swift and JavaScript?
Swift and JavaScript 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 JavaScript equivalent. See the comparison table below for the key differences between Swift and JavaScript.
Is the converted JavaScript code accurate?
The AI produces high-quality JavaScript code that preserves the behavior of your original Swift code and follows JavaScript conventions. It handles common patterns, data structures, and idioms for both Swift and JavaScript. For large or performance-critical code, review and test the JavaScript output before using it in production.
Can I convert an entire Swift project to JavaScript?
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 JavaScript. Signing in for free raises the input limit to 25,000 characters per conversion for larger files.
Can I convert JavaScript back to Swift?
Yes. CodeConvert AI converts in both directions, so you can convert JavaScript to Swift just as easily using our JavaScript to Swift converter. Try the JavaScript to Swift Converter
Is the Swift to JavaScript 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 JavaScript 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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