KeyboardKit is a SwiftUI SDK that lets you create fully customizable keyboard extensions with a few lines of code.

KeyboardKit extends Apple's limited keyboard APIs with more capabilities, and provides additional functionality, to let you build outstanding custom keyboards with little effort.

KeyboardKit is open-source and completely free. It can be extended with KeyboardKit Pro to unlock Pro features, like localized keyboards, autocomplete & autocorrect, AI support, an emoji keyboard, themes, dictation, and more.

KeyboardKit can be installed with the Swift Package Manager:

https://github.com/KeyboardKit/KeyboardKit.git

To use KeyboardKit in a keyboard extension, just import KeyboardKit and let your KeyboardController inherit KeyboardInputViewController instead of UIInputViewController:

import KeyboardKit

class KeyboardController: KeyboardInputViewController {}

This gives you access to lifecycle functions like viewWillSetupKeyboardView, observable state, services, etc.

The easiest way to set up KeyboardKit is to create a KeyboardApp value that defines information for your app:

extension KeyboardApp {

    static var keyboardKitDemo: Self {
        .init(
            name: "KeyboardKit",
            licenseKey: "keyboardkitpro-license-key",
            bundleId: "com.keyboardkit.demo",
            appGroupId: "group.com.keyboardkit.demo",
            deepLinks: .init(app: "kkdemo://")
        )
    }
}

To set up your keyboard, just override viewDidLoad and call setup(for:) with your KeyboardApp value:

class KeyboardViewController: KeyboardInputViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        setup(for: .keyboardKitDemo)
    }
}

To replace or customize the standard KeyboardView keyboard, just override viewWillSetupKeyboardView and call setupKeyboardView with the view you want to use:

class KeyboardViewController: KeyboardInputViewController {

    override func viewWillSetupKeyboardView() {
        super.viewWillSetupKeyboardView()
        setupKeyboardView { [weak self] controller in // <-- Use weak or unknowned self!
            KeyboardView(
                state: controller.state,
                services: controller.services,
                buttonContent: { $0.view },
                buttonView: { $0.view },
                collapsedView: { $0.view },
                emojiKeyboard: { $0.view },
                toolbar: { _ in MyCustomToolbar() }
            )
        }
    }
}

To set up your main app with the same configuration, just wrap the root content view in a KeyboardAppView:

import SwiftUI
import KeyboardKit

@main
struct MyApp: App {

    var body: some Scene {
        WindowGroup {
            KeyboardAppView(for: .keyboardKitDemo) {
                ContentView()
            }
        }
    }
}

Setting up your app and keyboard with a KeyboardApp will make settings sync between the two if an appGroupId is defined, register your KeyboardKit Pro license if a licenseKey is defined, set up dictation, deep links, etc.

For more information, see the getting started guide.

KeyboardKit supports 70 keyboard-specific locales:

🇺🇸 🇦🇱 🇦🇪 🇦🇲 🇧🇾 🇧🇬 🇦🇩 🏳️ 🇭🇷 🇨🇿
🇩🇰 🇳🇱 🇧🇪 🇦🇺 🇨🇦 🇬🇧 🇺🇸 🇪🇪 🇫🇴 🇵🇭
🇫🇮 🇫🇷 🇨🇦 🇧🇪 🇨🇭 🇬🇪 🇩🇪 🇦🇹 🇨🇭 🇬🇷
🇺🇸 🇮🇱 🇭🇺 🇮🇸 🏳️ 🇮🇩 🇮🇪 🇮🇹 🇰🇿 🇹🇯
🇹🇯 🇹🇯 🇱🇻 🇱🇹 🇲🇰 🇲🇾 🇲🇹 🇲🇳 🏳️ 🇳🇴
🇳🇴 🇮🇷 🇵🇱 🇵🇹 🇧🇷 🇷🇴 🇷🇺 🇷🇸 🇷🇸 🇸🇰
🇸🇮 🇪🇸 🇦🇷 🇲🇽 🇸🇪 🇰🇪 🇹🇷 🇺🇦 🇺🇿 🏴󠁧󠁢󠁷󠁬󠁳󠁿

KeyboardKit only includes localized strings, while KeyboardKit Pro unlocks localized keyboards, layouts, callouts and behaviors for all supported locales.

KeyboardKit is packed with features to help you build amazing custom keyboards:

• ⌨️ Essentials - Essential keyboard utilities, models, services & views.
• 💥 Actions - Trigger & handle keyboard-related actions.
• 📱 App - Define and set up your app, settings, etc.
• 💡 Autocomplete - Perform autocomplete as the user types.
• 🗯 Callouts - Show input & secondary action callouts.
• 🖥️ Device - Identify device type, device capabilities, etc.
• 😀 Emojis - Emojis, categories, versions, skin tones, etc.
• 🔉 Feedback - Trigger audio & haptic feedback with ease.
• 👆 Gestures - Handle a rich set of gestures on any key.
• 🔣 Layout - Define and customize dynamic keyboard layouts.
• 🌐 Localization - Localize your keyboard in 70 locales.
• 🗺️ Navigation - Open urls and other apps from the keyboard.
• 👁 Previews - Extensive SwiftUI preview support.
• 📄 Proxy - Extend the text document proxy with more capabilities.
• ⚙️ Settings - Provide keyboard settings & link to System Settings.
• 🩺 Status - Detect if a keyboard is enabled, has full access, etc.
• 🎨 Styling - Style your keyboard to great extent.

KeyboardKit Pro extends KeyboardKit with Pro features:

• ⌨️ Essentials - More essential tools, previews, toolbars, etc.
• 🤖 AI - Features that are needed for AI.
• 📱 App - App-specific screens & views.
• 💡 Autocomplete - Local & remote autocomplete, next word prediction, etc.
• 🗯 Callouts - Localized callout actions for all supported locales.
• 🎤 Dictation - Dictate text from the keyboard.
• 😀 Emojis - A powerful emoji keyboard, search, etc.
• ⌨️ External - Auto-detect if an external keyboard is connected.
• 🏠 Host - Identify and open specific host applications.
• 🔣 Layout - Localized layouts for all supported locales.
• 🌐 Localization - Services & views for all supported locales.
• 👁 Previews - Keyboard & theme previews for in-app use.
• 📄 Proxy - Allow UITextDocumentProxy to read the full document.
• 📝 Text - Allow users to type within the keyboard.
• 🍭 Themes - A theme engine with many pre-defined themes.

The online documentation has a detailed article for each feature, a thorough getting-started guide, code samples, etc. You can also build it from the source code to get better formatting.

The Demo folder has a demo app that shows how to set up the main keyboard app, show keyboard status, provide in-app settings, link to system settings, apply custom styles, etc.

The app has two keyboards - a Keyboard that uses KeyboardKit and a KeyboardPro that uses KeyboardKit Pro. Note that you need to enable Full Access for some features to work, like haptic feedback.

If you want to try KeyboardKit without having to write any code or build the demo app from Xcode, the KeyboardKit app lets you try out many features by just downloading it from the App Store.

KeyboardKit is open-source and completely free, but you can support the project by becoming a GitHub Sponsor, upgrading to KeyboardKit Pro or get in touch for freelance work, paid support etc.

Feel free to reach out if you have questions or if you want to contribute in any way:

• Website: keyboardkit.com
• Mastodon: @[email protected]
• Twitter: @getkeyboardkit
• E-mail: [email protected]

KeyboardKit is available under the MIT license. See the LICENSE file for more info.