#185 · Programming Language Tools Developer Tool

Swift Checker

Review Swift code safety, style, concurrency, memory management, and SwiftUI patterns online. Processing stays in your browser.

Developer Input

Swift source

Swift Source Code

import SwiftUI

final class ProfileViewModel: ObservableObject {
    @Published var name: String! = nil

    func load() {
        Task.detached {
            self.name = "Alex"
        }
    }
}

Swift Version

Warning Limit

issues

Check concurrency Check memory Check SwiftUI Auto-run while typing

How to use this developer tool

Paste source code or load the included working example.
Choose the swift version and adjust the additional setting.
Enable only the checks or output options needed for this review.
Select Check Swift and inspect the output, status, and measured processing time.
Copy or download the result after reviewing heuristic findings.

What this developer tool does

This tool performs browser-based structural and static analysis. It does not replace the official Kotlin or Swift compiler.

Source input → string and comment masking → token or rule analysis → structured output → statistics and recommendations.

Heuristic findings are labeled for review. Confirm production code with the official compiler, IDE, and project test suite.

Example

The loaded example is executable test input for the Swift Checker. Run the tool to see its expected output and status.

Tips for better output

Use complete declarations when possible so scope and block ranges can be estimated correctly.
Keep strings and comments intact; the analyzer masks them before structural processing.
Review every automatic conversion before replacing source in a production project.
Use the official compiler for final syntax, type, dependency, and platform validation.

FAQ

How can I check Swift force unwraps online?

Paste Swift source and run the checker to locate force unwrap, implicitly unwrapped optional, as!, and try! patterns.

Can this Swift checker find concurrency problems?

It identifies common review candidates involving Task.detached, MainActor usage, async code, and Sendable-related patterns.

How do I detect strong self captures in Swift closures?

Enable memory checks. The tool searches closure bodies for self references without an obvious weak capture list.

Can this tool check SwiftUI property wrapper usage?

Yes. It detects common @State, @StateObject, @ObservedObject, and ForEach patterns that may need review.

Does the Swift checker compile my code?

No. It provides static browser-based checks and recommendations, not full Swift compiler diagnostics.

Related developer tools

TypeScript Checker TypeScript Generator TypeScript Formatter TypeScript Converter

Swift Checker modules

Module	Purpose
Safety	Checks force unwraps, casts, and forced try.
Concurrency	Reviews selected async patterns.
Memory	Finds possible strong self captures.

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