Format Swift code following Apple style conventions with configurable indentation and line wrapping.
Swift code arrives with tabs, spaces, and judgment calls mixed in, but Apple's whitespace conventions are mostly fixed rules: a space after the colon in `let x: Int`, spaces around operators, nothing inside the angle brackets of `Array<Int>`. This tool re-emits whatever you paste with those rules applied, plus configurable indentation and line wrapping, entirely in the browser, so the code never leaves the page. The surprise is what it will not do: it touches only whitespace and line breaks. Badly named variables, force unwraps, and other style sins pass through untouched.
A concrete input and expected output from the current implementation.
Input
func add(a:Int,b:Int)->Int{
let sum=a+b
return sum
}
Expected output
func add(a: Int, b: Int) -> Int {
let sum = a + b
return sum
}
The colon, comma, arrow, and operator spacing all follow Apple's conventions, and the body is indented two spaces per the selected setting. No wrapping occurs because every line fits within the configured width. Reformatting the output returns identical text.
The pasted text is parsed into a Swift syntax tree before any rewrite happens, and the rules operate on that tree. That is how the formatter tells a colon in `let x: Int` from a colon in `[String: Int]` or a ternary `a ? b : c`. Because parsing comes first, a snippet with a syntax error anywhere is rejected whole: you get an error, never a half-formatted result.
Formatting is deterministic: identical input and identical settings always produce identical output, and formatting the output again changes nothing. The two main controls are indentation and the maximum line length. When a line exceeds that length, wrapping happens at structural points such as argument boundaries and around operators, never in the middle of a token or inside a string literal.
Not necessarily. Xcode's editor is not a full formatter; it mostly reindents what you type, and its defaults differ from Apple's own swift-format (Xcode uses 4-space indentation, swift-format defaults to 2). Set this tool's indentation to match your Xcode preferences and the common cases will agree, but wrapping choices can still differ.
Only whitespace and line breaks. Identifiers, literals, comments, and semantics never change, and a string literal's contents are untouched. Formatting is idempotent: running the same settings twice returns the same text. The whole job happens in the page, so pasting proprietary code does not send it anywhere.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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