Online URL Encoder and Decoder

Overview

A privacy-focused, client-side utility designed for web developers and engineers to instantly convert text or binary files into URL-encoded strings (percent-encoding) and vice versa.

Layout Structure

• Header: Simple, clean title indicating the tool's core utility.
• Main Interface: A split-pane layout featuring an 'Input' area and an 'Output' area.
• Action Bar: A sticky bottom or center bar containing 'Encode', 'Decode', 'Clear', and 'Copy to Clipboard' buttons.
• File Module: A drag-and-drop zone that accepts files and converts them to base64 or URL-encoded character sequences.

Design and Aesthetics

• Color Palette: Professional grayscale with a primary 'Action Blue' (#0056b3) for primary buttons and 'Success Green' (#28a745) for copy confirmation.
• Animations:
  • Smooth transitions between encode and decode modes.
  • Subtle fade-in animations when the output is generated.
  • Haptic-like visual feedback (button glow) upon successful copy.

Core Interactive Features

1. Real-time Encoding/Decoding: Text updates as you type (with a toggle to enable/disable auto-process).
2. File Processing: Secure client-side file reading using the File API, ensuring no data is sent to a server.
3. Encoding Levels: Toggle support for standard RFC 3986 encoding (where spaces become %20) versus strict encoding (where spaces become +).
4. Batch Clipboard Operation: One-click copy functionality to quickly retrieve the processed string.
5. History Log: A localized session storage feature that allows users to revisit their last 5 encoded/decoded inputs during the session.