Mask Swift code in the browser
Select types, functions, identifiers, values, and comments to create a shareable Copy that lets you review Swift structure. The input Source is not sent to or stored on the Develop Tools server.
Open Swift Code Masking ToolConclusion
Check Tokens, Private URLs, Bundle IDs, Type names, Function names, and Comments, then create a shareable copy that preserves Swift types, Optional, and Concurrency Context.
Separate secret information from investigation context before sharing
final class InternalUserService {
private let token = "dummy-secret"
func fetchUser(id: String?) async throws -> User {
// https://internal.example.test/users/(id!)
}
}| Candidates to retain | Candidates to hide |
|---|---|
| class, func, async, and throws | Project Type, Function, and Property |
| URLSession, Result, Error Type | Token, internal URL, Bundle ID |
| Optional and Actor Annotation | Comment, build path, organization name |
Procedure for checking with the Swift code masking tool
- 1. Extract the minimum scope needed for consultation into a separate copy.
- 2. Select types, functions/methods, identifiers, values, and comments.
- 3. Compare Optional, generics, closures, and concurrency annotations.
- 4. Restore only required words by right-clicking, then share only the result.
Checklist to prevent oversights
| Category | Account to check |
|---|---|
| Authentication | API Key, Token, Password |
| connection | Host, Query, Path ID |
| Identifiers | Type, Function, Property, Module |
| Nearby | Comment, Log, Build Path, Bundle ID |
Check that Swift-specific syntax and type Context have not been broken
- Check whether declarations and references for class, struct, enum, actor, protocol, extension, and func use the same dummy names
- Whether argument labels, parameter names, generics, associated types, some/any, and where clauses remain
- Check that Optional ? and !, Optional Chaining, ??, if let, guard let, and Force Unwrap have not been changed arbitrarily.
- Check whether the closure capture list, [weak self] / [unowned self], @escaping, @autoclosure, and $0 / $1 remain
- Whether async, await, Task, actor, @MainActor, Sendable, isolated, nonisolated, and similar features were checked with the toolchain in use
- Whether String Interpolation, Raw String, Regex, KeyPath, #selector, CodingKeys, Macro, and Property Wrapper were manually aligned
The current Tool does not guarantee semantic analysis of @Sendable, @unchecked, @preconcurrency, $1 and later, Interpolation, Regex, Custom Macro, or KeyPath. Restore relevant portions by right-clicking or manually adjust them to Dummy names.
Final check before sharing with AI, an issue, or chat
- Search for API keys, access tokens, passwords, authorization, cookies, and Keychain keys.
- Check internal hosts, URLs, queries, email addresses, IP addresses, bundle identifiers, URL schemes, and file paths.
- Check whether the Project can be inferred from Type, Module, Function, Property, Notification Name, UserDefaults Key, and Comments
- Inspect compiler diagnostics, build paths, crash logs, stack traces, and screenshots separately from source code
- Retain investigation Context such as Swift Version, Language Mode, Xcode Version, Error Type, and Concurrency Annotation
- Share only the masking results, and retain the original source and mapping information in an access-controlled location
Secret management and masking are separate measures. Do not merely hide leaked Credentials; also revoke and reissue them and review the storage method.
What the current Swift code masking tool can and cannot do
| Item | Current support | Points to note |
|---|---|---|
| Input | Paste Swift text | Do not directly load or download .swift files. |
| declaration | Classify class, struct, enum, actor, protocol, extension, typealias, and func | This is not full syntax parsing equivalent to the Swift Compiler or SwiftSyntax |
| Identifiers | Replace types, functions, and identifiers consistently by original name | Does not track Scope, Overload, Shadowing, or Argument Labels as Compiler Symbols. |
| Concurrency | Retain some standard terms such as actor, async, await, and MainActor. | @Sendable, @unchecked, @preconcurrency, and custom global actors do not guarantee automatic protection. |
| Closure | Retain braces, capture lists, weak, and unowned as text. | $0 remains, but when values are targeted, digits after $1 are changed to 0, so manual review is required. |
| Literal | Recognize delimiters for standard, raw, and multiline strings and numeric notation | Do not preserve String Interpolation content or perform Regex Literal-specific parsing |
| Macro / wrapper | Display line-leading #Directive as syntax and retain some standard wrappers | Do not specially parse @Observable, custom macros, custom property wrappers, or code after macro expansion. |
| Framework | Preserve Swift standard types and some Foundation and SwiftUI names | This is not a Framework Symbol Table covering UIKit, SwiftUI, and Package-specific APIs |
| Dynamic references | Process identifiers and similar items inside #selector using ordinary rules as well. | Does not guarantee automatic synchronization between Selectors, KeyPaths, CodingKeys, String references, and declarations. |
| output | Copy results, clear all, and individually unmask results by right-clicking | Does not provide a mapping list, Mapping Download, or saved history |
| Save | Save only display settings in LocalStorage. | Do not save input source, results, or mappings in LocalStorage. |
| Privacy | Process input and conversion in the browser. | Do not send or save Source and results to the Develop Tools server. |
Masking results are copies for sharing. They do not replace swiftc, Xcode builds, tests, SwiftLint, or testing on an actual device.
Check the specification in official Swift documentation and the Toolchain you use
- The Swift Programming Language
- Swift Concurrency
- Migrating to Swift 6
- Automatic Reference Counting
- Optional Chaining
- Swift Macros
Swift Concurrency, Macro, Access Control, and similar features behave differently depending on the Language Mode and Toolchain. Do not confuse Stable Releases with Development Snapshots; check the official documentation and Build results for the Swift and Xcode versions you use.
Example: Ask AI about a Swift Compile Error
Check Tokens, Private URLs, Bundle IDs, Type names, Function names, and Comments, then create a shareable copy that preserves Swift types, Optional, and Concurrency Context.
Use dummy data such as example.test instead of real tokens, real customer information, or internal URLs, and verify only the minimum scope needed to reproduce the issue.
- Extract minimal reproducible Code into a separate Copy
- Mask identifiers, values, and Comments
- Compare Swift-specific syntax and type/Concurrency Context
- Share only the masking results
You can individually unmask anonymized locations in the result by right-clicking. Before sending, recheck whether the revealed original information is truly necessary for sharing.
Frequently asked questions
- Can I directly load .swift files?
- Direct loading is not supported. Paste the required Swift Text into the input field. Partial Swift is also handled as Text, but this is not analysis by the Swift Compiler or SwiftSyntax.
- Can @Sendable, $1, string interpolation, and macros also be preserved automatically and safely?
- Not guaranteed. Manually check @Sendable, @unchecked, @preconcurrency, $1 and later, Interpolation, Regex, Custom Macros/Property Wrappers, and dynamic references. Restore needed parts by right-clicking or align them to Dummy names.
- Is the entered Swift Source sent to a server?
- Input and masking results are processed in the browser and are not sent to or stored on the Develop Tools server. Only display settings are saved to LocalStorage.