Free Online WEBP to Animated GIF Converter

A high-performance, client-side browser application designed to convert WEBP image files (both static and animated) into animated GIF files. This tool is built for users who require privacy, speed, and efficiency without the need for server-side uploads.

Core Features

• Client-Side Processing: Utilize the browser's internal engine to encode GIFs, ensuring zero data exposure.
• Drag-and-Drop Interface: Intuitive file import system for single or multiple file processing.
• Dynamic Preview: Real-time visualization of the output GIF before downloading.
• Customizable Export Settings:
  • Frame rate (FPS) adjustment.
  • Quality settings (Dithering, palette size).
  • Loop control (Infinite vs. fixed count).
• Instant Download: Direct download trigger upon conversion completion.
• Mobile-Responsive: Optimized for touch interactions on tablets and smartphones.

UI/UX Design Specification

• Aesthetic: Clean, minimalist, "SaaS" aesthetic. High-contrast light mode with generous whitespace, rounded corners (8px/12px), and soft, subtle drop shadows (0 4px 6px rgba(0,0,0,0.1)).
• Color Palette:
  • Background: #FFFFFF (Pure White)
  • Primary Accent: #2563EB (Vibrant Blue)
  • Secondary Accent: #64748B (Slate Grey)
  • Text: #1E293B (Dark Slate)
  • Success/Download: #059669 (Emerald)
• Layout:
  • Header: Simple, centered title with a brief explanation.
  • Main Area: A large, dashed-border dropzone that provides immediate call-to-action.
  • Control Panel: A side-bar or section appearing after upload to fine-tune GIF settings.
  • Preview Area: A central card displaying the generated or source frames.
• Animations: Subtle fade-in transitions for UI elements and a smooth indeterminate progress bar during the rendering process.

Technical Implementation Directives

• Architecture: Single-file HTML (HTML5 + CSS3 + Vanilla JavaScript).
• Storage: STRICTLY FORBIDDEN to use localStorage, sessionStorage, or cookies. Manage all image data via Blob, File, and ArrayBuffer objects in-memory.
• Processing:
  • Use a library like gif.js (loaded via CDN) to handle GIF encoding logic.
  • Utilize Canvas API for frame manipulation.
  • Use Worker threads (via Blob URL) to handle the CPU-intensive GIF rendering process to prevent UI main-thread blocking.
• Compatibility:
  • No alerts, prompts, or confirms. Use custom, DOM-based modal windows for all user interactions.
  • All external links must use target="_blank" and rel="noopener noreferrer".
• Performance: Ensure efficient cleanup of object URLs (URL.revokeObjectURL) to prevent memory leaks in long-running browser sessions.