Input

Output

What is Swift?

Swift is a powerful, modern programming language developed by Apple for iOS, macOS, watchOS, and tvOS development. You can read the full language reference in The Swift Programming Language book. It is designed to be safe, fast, and expressive — learn more on Wikipedia.

The Swift Formatter normalizes indentation (2 spaces per level), fixes brace alignment, and removes trailing whitespace — following Swift API Design Guidelines.

How to Use

Paste your Swift code

Paste raw or messy Swift source code into the left editor, or click Upload to load a .swift file.

Instant formatting

The formatter automatically normalizes indentation (2 spaces), fixes brace and bracket alignment, and cleans up whitespace.

Copy or download

Use the Copy button to copy the result, or Download to save it as a main.swift file.

Formatting Example

Example: Format a Swift struct

Unformatted input:

struct User{var name:String
var age:Int
func greet()->String{"Hello, \(name)!"}
var isAdult:Bool{age>=18}}

Formatted output:

struct User {
    var name: String
    var age: Int

    func greet() -> String {
        "Hello, \(name)!"
    }

    var isAdult: Bool {
        age >= 18
    }
}

Frequently Asked Questions

Does this formatter handle Swift closures?

Yes. Swift closures use brace-based syntax and are handled by the formatter's brace indentation logic. Trailing closure syntax and multi-line closures are properly indented.

Can I format SwiftUI code?

Yes — SwiftUI code follows standard Swift syntax. Paste your SwiftUI view code and the formatter will normalize indentation across all struct, var body blocks, and modifier chains.

Does this replace swift-format?

This is a lightweight online indentation formatter. For local development, Apple's SwiftFormat tool provides full style enforcement with many more rules. This tool is ideal for quick formatting without any installation.

Is my Swift code safe when I use this tool?

Yes, completely. All formatting runs directly in your browser — no code is ever sent to a server. Your Swift source stays private and secure at all times.

Swift Formatter