Three simple steps
How to use this tool?
This free online converter translates Swift source code into Zig 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 Zig.
- Step 3
Review the result
Review, copy, or download the resulting Zig code from the output editor.
Language comparison
Key differences between Swift and Zig
| Characteristic | Swift | Zig |
|---|---|---|
| Syntax | Modern, concise, influenced by Objective-C and scripting languages; uses clear, expressive syntax. | Minimalist, C-like, explicit; prioritizes clarity and control with little syntactic sugar. |
| Paradigm | Multi-paradigm: supports object-oriented, protocol-oriented, and functional programming. | Procedural and imperative; does not support OOP or functional paradigms natively. |
| Typing | Statically typed with strong type inference and safety features. | Statically typed with explicit types and compile-time evaluation; focuses on safety and predictability. |
| Performance | High performance, optimized for Apple platforms; uses ARC for memory management. | Very high performance, close to C; manual memory management, no hidden control flow. |
| Libraries and frameworks | Rich ecosystem, especially for iOS/macOS development (e.g., SwiftUI, Foundation). | Smaller ecosystem; can use C libraries easily but lacks extensive native libraries. |
| Community and support | Large, active community; strong support from Apple and open-source contributors. | Growing but smaller community; mostly driven by open-source contributors. |
| Learning curve | Beginner-friendly, especially for those familiar with modern languages; good documentation. | Steeper learning curve due to low-level concepts and manual memory management. |
Common questions
Frequently Asked Questions
How do I convert Swift to Zig?
Paste your Swift code into the input box, confirm the languages are set to Swift and Zig, and click Convert. CodeConvert AI analyzes your Swift code and generates equivalent Zig code in seconds, preserving the original logic and structure.
What are the main differences between Swift and Zig?
Swift and Zig 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 Zig equivalent. See the comparison table below for the key differences between Swift and Zig.
Is the converted Zig code accurate?
The AI produces high-quality Zig code that preserves the behavior of your original Swift code and follows Zig conventions. It handles common patterns, data structures, and idioms for both Swift and Zig. For large or performance-critical code, review and test the Zig output before using it in production.
Can I convert an entire Swift project to Zig?
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 Zig. Signing in for free raises the input limit to 25,000 characters per conversion for larger files.
Can I convert Zig back to Swift?
Yes. CodeConvert AI converts in both directions, so you can convert Zig to Swift just as easily using our Zig to Swift converter. Try the Zig to Swift Converter
Is the Swift to Zig 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 Zig 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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