Codable

Web developer tools for mobile

Free

Safari-native web developer tools for iPhone and iPad: inspect elements, run JavaScript, view source, monitor network calls, and test responsive layouts. Codable is a lightweight web developer toolkit for iPhone and iPad. Use the Safari extension to inspect pages where they already run. Select elements inline, browse the DOM tree, view HTML, inspect styles and node metadata, evaluate JavaScript, capture console output, view source, inspect resources, and review network activity. The main app has three tabs for development and testing: - Resize: a browser surface for testing responsive layouts with custom viewport width, height, scale, presets, and drag handles. - Scratchpad: a JavaScript editor and runner with syntax coloring, code-focused keyboard shortcuts, document support, and optional Apple Intelligence assistance on supported devices. - Extension: a small info page with instructions on how to enable the Safari extension, and a way to view a local demo page with CSS, JavaScript, resources, console logs, and network requests to try out the tools within Safari.

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In this version: - "Resize" tool now includes more device presets, pixel density control shown in the UI, and has basic user-agent switching support - Console and "Resize" have improved display - Safari Extension now shares theme settings with the companion app 2.0 Update notes: Codable has been rebuilt as a modern Safari-native developer toolkit. - New Safari Web Extension for Elements, Console, Source, Network, and Resources - Inline element selection with DOM tree navigation, HTML, style, node, and frame details - JavaScript console with page-context evaluation and console output capture - Responsive Resize browser with viewport presets, drag handles, scaling, and basic tabs - Scratchpad with syntax coloring, document picker support, DOM-capable JavaScript execution, and code keyboard shortcuts - Optional on-device Apple Intelligence code assistance on supported devices - Local demo page for testing the Safari extension - New SwiftUI app interface, updated icons, launch screen, and iPad support

The developer, Jeremy Collins, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Size
    • 5.4 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 26.4 or later.
    • iPhone
      Requires iOS 26.4 or later.
    • iPad
      Requires iPadOS 26.4 or later.
    • Apple Vision
      Requires visionOS 26.4 or later.
    Languages
    • English
    Age Rating
    16+
    Provider
    Jeremy Collins
    • Jeremy Collins has not identified itself as a trader for this app. If you are a consumer in the European Economic Area, consumer rights do not apply to agreements between you and the provider.
    Copyright
    • © 2026 Jeremy Collins