Technical Specification: Free Online Reading Time Estimator

Overview

This application is a clean, efficient, and user-friendly web tool designed to calculate the estimated reading time of any text content based on configurable Words Per Minute (WPM) settings. The app provides immediate feedback and requires zero external dependencies outside of standard CDNs.

Core Features

• Real-Time Calculation: The reading time updates instantly as the user types or pastes text into the editor.
• Configurable WPM: A slider and manual input field to adjust reading speed (range: 50–500 WPM) to account for reading difficulty.
• Metrics Dashboard: Clear, prominent display of 'Estimated Time', 'Word Count', and 'Character Count'.
• Responsive Design: Mobile-first approach where inputs and output results resize elegantly on tablets, phones, and desktops.
• One-Click Reset: A quick action button to clear all inputs safely.
• Clipboard Interaction: A button to copy a summary of the reading stats for quick reference.

UI/UX Design System

• Palette: Use a clean, professional aesthetic.
  • Background: #f8fafc
  • Text: #1e293b
  • Accent (Primary): #6366f1 (Indigo)
  • Cards: #ffffff with light shadow 0 4px 6px -1px rgb(0 0 0 / 0.1)
• Typography: Inter or system-sans fonts for high readability.
• Micro-interactions: Subtle transitions for all interactive elements using CSS transition: all 0.2s ease;.

Technical Implementation

• Architecture: Single index.html file using embedded <style> and <script> tags.
• Dependencies: Tailwind CSS via CDN for styling layout and utilities.
• Iframe/Sandbox Constraints:
  • NO Persistence: Do not use localStorage, sessionStorage, or cookies. Maintain all data in memory (JS variables).
  • NO Popups: Use HTML/CSS modals for any necessary alerts (e.g., "Copied to clipboard!").
  • Links: All external documentation links must use target="_blank" rel="noopener noreferrer".
• Responsiveness: Use Flexbox/Grid for a container that flows from column (mobile) to row (desktop) based on screen width.

Layout Specification

1. Header: Simple application title and brief description centered at the top.
2. Main Configuration Area: A row containing the WPM slider, current WPM value display, and reset button.
3. Editor Area: A high-quality textarea with auto-resizing height or a generous fixed min-height.
4. Results Bar: A sticky or clearly pinned card showing:
   • ⏱️ Reading Time (displayed in "X min Y sec" format).
   • 📝 Word Count.
   • 🔠 Character Count.

Developer Instructions

1. Vanilla JS Only: Do not use frameworks like React, Vue, or Angular.
2. State Management: Use a simple object variable to track textValue and wpm. Re-render the UI whenever these values change via an input event listener.
3. Math Logic: Reading time (in minutes) = Word Count / WPM. Handle the conversion to minutes and seconds cleanly without floating-point errors.