etherlink-intern · etherlink-intern · May 31, 2026 · May 31, 2026 · May 31, 2026
diff --git a/App/SwiftMarkItDownApp/ContentView.swift b/App/SwiftMarkItDownApp/ContentView.swift
@@ -0,0 +1,140 @@
+import Foundation
+import SwiftMarkItDown
+import SwiftUI
+
+struct ContentView: View {
+    @State private var selectedFormat = DemoFormat.html
+    @State private var input = DemoFormat.html.sampleInput
+    @State private var output = ""
+    @State private var errorMessage: String?
+
+    var body: some View {
+        NavigationStack {
+            Form {
+                Section("Input") {
+                    Picker("Format", selection: $selectedFormat) {
+                        ForEach(DemoFormat.allCases) { format in
+                            Text(format.label).tag(format)
+                        }
+                    }
+                    .pickerStyle(.segmented)
+                    .onChange(of: selectedFormat) { newValue in
+                        input = newValue.sampleInput
+                        output = ""
+                        errorMessage = nil
+                    }
+
+                    TextEditor(text: $input)
+                        .font(.system(.body, design: .monospaced))
+                        .frame(minHeight: 180)
+                        .accessibilityIdentifier("conversionInput")
+                }
+
+                Section {
+                    Button("Convert to Markdown", action: convert)
+                        .buttonStyle(.borderedProminent)
+                        .accessibilityIdentifier("convertButton")
+                }
+
+                if let errorMessage {
+                    Section("Error") {
+                        Text(errorMessage)
+                            .foregroundStyle(.red)
+                    }
+                }
+
+                Section("Markdown Output") {
+                    TextEditor(text: .constant(output))
+                        .font(.system(.body, design: .monospaced))
+                        .frame(minHeight: 180)
+                        .accessibilityIdentifier("conversionOutput")
+                }
+            }
+            .navigationTitle("SwiftMarkItDown")
+        }
+    }
+
+    private func convert() {
+        do {
+            let request = ConversionRequest(
+                data: Data(input.utf8),
+                fileName: "sample.\(selectedFormat.fileExtension)",
+                formatHint: selectedFormat.documentFormat
+            )
+            output = try MarkItDown().convert(request).markdown
+            errorMessage = nil
+        } catch {
+            output = ""
+            errorMessage = error.localizedDescription
+        }
+    }
+}
+
+private enum DemoFormat: String, CaseIterable, Identifiable {
+    case plainText
+    case html
+    case csv
+    case json
+
+    var id: String { rawValue }
+
+    var label: String {
+        switch self {
+        case .plainText: "Text"
+        case .html: "HTML"
+        case .csv: "CSV"
+        case .json: "JSON"
+        }
+    }
+
+    var fileExtension: String {
+        switch self {
+        case .plainText: "txt"
+        case .html: "html"
+        case .csv: "csv"
+        case .json: "json"
+        }
+    }
+
+    var documentFormat: DocumentFormat {
+        switch self {
+        case .plainText: .plainText
+        case .html: .html
+        case .csv: .csv
+        case .json: .json
+        }
+    }
+
+    var sampleInput: String {
+        switch self {
+        case .plainText:
+            """
+            Hello SwiftMarkItDown
+            This text is passed through as Markdown.
+            """
+        case .html:
+            """
+            <html>
+              <head><title>Ignored title</title></head>
+              <body>
+                <h1>Hello from iOS</h1>
+                <p>Convert <strong>native Swift</strong> content.</p>
+                <a href="https://example.com">Example</a>
+              </body>
+            </html>
+            """
+        case .csv:
+            """
+            Name,Note
+            Swift,Native
+            "Mark, It Down","CSV | escaped"
+            """
+        case .json:
+            #"{"title":"Roadmap","formats":["txt","html","csv","json"]}"#
+        }
+    }
+}
+
+#Preview {
+    ContentView()
+}
diff --git a/App/SwiftMarkItDownApp/SwiftMarkItDownApp.swift b/App/SwiftMarkItDownApp/SwiftMarkItDownApp.swift
@@ -0,0 +1,10 @@
+import SwiftUI
+
+@main
+struct SwiftMarkItDownDemoApp: App {
+    var body: some Scene {
+        WindowGroup {
+            ContentView()
+        }
+    }
+}
diff --git a/README.md b/README.md
@@ -1,6 +1,6 @@
 # SwiftMarkItDown
 
-SwiftMarkItDown is the start of a native Swift/iOS document-to-Markdown pipeline inspired by Microsoft MarkItDown. The repository is structured as a Swift Package so the same core can be embedded in an iOS app, a macOS utility, or a server-side Swift service.
+SwiftMarkItDown is the start of a native Swift/iOS document-to-Markdown pipeline inspired by Microsoft MarkItDown. The repository is structured around a Swift Package so the same core can be embedded in an iOS app, a macOS utility, or a server-side Swift service. The repo also includes a minimal SwiftUI demo app that exercises the package on iOS.
 
 ## Current scope
 
@@ -17,11 +17,16 @@ PDF, DOCX, PPTX, and XLSX are intentionally represented in the format model but
 
 ```text
 Package.swift
+SwiftMarkItDownApp.xcodeproj/  Xcode project for the iOS demo app
+App/
+  SwiftMarkItDownApp/          SwiftUI app target that imports the package
 Sources/
-  SwiftMarkItDown/          Core library and converter protocols
-  swift-markitdown/         Minimal CLI wrapper around the library
+  SwiftMarkItDown/             Core library and converter protocols
+  swift-markitdown/            Minimal CLI wrapper around the library
 Tests/
-  SwiftMarkItDownTests/     Core conversion tests
+  SwiftMarkItDownTests/        Core conversion tests
+  Fixtures/                    CLI smoke-test inputs
+  Expected/                    CLI smoke-test expected Markdown
 ```
 
 ## Library usage