Walnut: Webview Debug & Test

Test WKWebView & SafariVC

Free · In‑App Purchases · Designed for iPad

The ultimate developer tool for testing WKWebView and SFSafariViewController configurations in real-time. KEY FEATURES WKWebView Testing • Real-time configuration testing with 20+ options • Built-in DevTools: Console, Network, Storage, Performance, Sources, Accessibility • JavaScript injection and snippet execution • Custom User-Agent emulation • Viewport and device emulation SFSafariViewController Testing • Native Safari experience with content blockers • Reader mode and responsive size control • Customizable bar colors and dismiss button styles Developer Tools • Console: Capture console.log with %c CSS styling support • Network: Monitor fetch/XHR requests with timing data • Storage: View/edit localStorage, sessionStorage, cookies • Performance: Web Vitals (LCP, FID, CLS) and Navigation Timing • Sources: DOM tree inspection, stylesheets, scripts • Accessibility: axe-core based accessibility auditing Additional Features • Bookmark management for quick URL access • Responsive viewport resizing (iPhone, iPad, Desktop presets) • Screenshot capture • API capability detection • Dark mode support Perfect for iOS developers who need to test web content rendering, debug JavaScript, analyze network requests, and ensure accessibility compliance.

Ratings & Reviews

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- Fixed independent log retention settings between Console and Network. - Fixed per-page and same-origin clearing behavior on navigation. - Improved request body detection (JSON/FormData/stream types) and Eruda load stability.

Version 1.8.11

The developer, Jiwon Park, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data

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

The developer indicated that this app supports the following accessibility features. Learn More

  • Supported Features

    • VoiceOver

    • Voice Control

    • Dark Interface

    • Differentiate Without Color Alone

    • Sufficient Contrast

Information

  • Seller
    • Jiwon Park
  • Size
    • 28.7 MB
  • Category
    • Developer Tools
  • Compatibility
    Requires iOS 18.4 or later.
    • iPhone
      Requires iOS 18.4 or later.
    • iPad
      Requires iPadOS 18.4 or later.
    • Mac
      Requires macOS 15.4 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.4 or later.
  • Languages
    English and 32 more
    • English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
  • Age Rating
    16+
    • 16+
    • Learn More
    • Contains
      Unrestricted Web Access
      Advertising
  • In-App Purchases
    Yes
  • Copyright
    • © 2026 Jiwon Park
  • Developer Website
  • Privacy Policy

    • More by Jiwon Park