Flutter Tools & UI Builder Pro vs HTML Web Preview

Flutter Tools is the ultimate toolkit for Flutter developers — 34+ tools in one beautiful app. DESIGN TOOLS • Gradient Generator — Linear, radial, sweep, and shimmer gradients • Box Decoration Editor — Borders, shadows, radius, and backgrounds • Glassmorphism Generator — Create frosted glass UI effects • Color Palette — Material & Tailwind color palettes with shades COLOR TOOLS • Color Shade Generator — Generate light/dark variants • Color Converter — HEX ↔ RGBA ↔ HSL with live preview CODE TOOLS • JSON to Dart — Convert JSON to typed Dart classes • Snippet Generator — Reusable Flutter code snippets • Base64 Encoder/Decoder — Encode and decode Base64 • Regex Tester — Test and validate regular expressions • Code Formatter — Format Dart code with style options • Lorem Ipsum Generator — Generate placeholder text UI TOOLS • Widget Preview — Preview Material widgets with customizable props • Container Editor — Visual container/styled box editor • Icon Search — Browse and preview all Material & Cupertino icons • Responsive Checker — Test layouts at multiple screen sizes • Animation Curve — Visualize and preview Flutter animation curves ASSET TOOLS • Assets Generator — Generate app icons and splash screens • Package Checker — Check dependencies for updates and security REFERENCE TOOLS • Widget Catalog — Material 3 widget reference with properties & code • Package Explorer — Explore pub.dev packages with install instructions • Dart API Reference — Dart SDK classes, methods, and constructors • State Management Comparison — Compare Riverpod, Provider, Bloc, GetX • Animation Reference — Flutter curves, controllers, and tweens • Git Cheat Sheet — Common Git commands with one-tap copy LEARNING TOOLS • Learning Paths — Structured Flutter learning paths from beginner to advanced • Flutter Roadmap — Interactive roadmap to becoming a Flutter developer • Snippet Library — Curated Flutter code snippets with step-by-step guides • Concept Visualizer — Interactive visualizations of Widget Tree, BuildContext, Constraints UTILITIES • Layout Solver — Detect layout issues and get fix suggestions • Color Accessibility Checker — WCAG contrast compliance checker • Asset Optimizer — Generate pubspec.yaml asset configurations • Release Checklist — Pre-launch checklist for iOS • i18n Manager — Manage localization across EN, ZH, ZH-Hant PRO FEATURES • Remove all ads • Unlock all 30+ tools • Priority access to new tools • Cloud sync your settings • Export & share projects • All future tools included

Open your web projects on iPhone and iPad. HTML Web Preview opens a folder of HTML and its related files, with JSON and source available alongside the page. Explore your own study materials, web documents, small tools and prototypes on your device. • Open a project folder: keep HTML, CSS, JavaScript, images and JSON together with their file structure intact. • Keep your originals: the app does not modify selected files or folders. Switch between formatted JSON and original text, and refresh after editing files in another app. • Preview before running: folders open with page JavaScript disabled. Review the contents and run only projects you trust. A separately confirmed compatibility mode is available for some web features. • Adjust the view: collapse the controls or change the display area using mobile, tablet and computer aspect ratios. Aspect ratios do not reproduce every feature of a device. • Inspect errors: distinguish missing files from page errors and check the project activity log. Before you begin Projects can work offline when all required files are stored on your device and no external services are needed. Cloud downloads, external web resources and ads may require internet access. ZIP extraction, file editing, server-side programs such as Python, PHP or Node.js, project builds and download management are not supported. Open the finished web output folder for projects that need a build step. Page inputs and runtime state are not permanently saved and may reset when a project closes or restarts. Read-only access does not block every form of external communication. Run only trusted projects without sensitive files. The version 1.2 interface supports Korean, English, Japanese, Simplified and Traditional Chinese, German, French, Spanish and Brazilian Portuguese. Your documents and code remain in their original language.