Developer Tools

Practical utilities and productivity tools for developers, designers, and content creators.

📋 Overview

Tools projects showcase:

• DOM Manipulation - Direct browser interaction
• File Processing - Upload, parse, transform
• Data Conversion - Format transformation
• Code Generation - Boilerplate creators
• Developer Utilities - Testing, debugging
• Productivity Apps - Workflow automation

🛠️ Projects List

35-37: Code Tools

35 - JSON Formatter/Validator

Tech Stack: React, TypeScript

Developer utility for JSON:

• Format/beautify JSON
• Validate JSON syntax
• Minify JSON
• Color-coded output
• Error highlighting
• Copy to clipboard
• File upload/paste input

Features:

• Real-time validation
• Syntax error detection
• Collapsible sections
• Export formatted JSON
• Compare two JSONs

36 - CSS Generator

Tech Stack: React, Tailwind CSS

Visual CSS tool:

• Gradient generator
• Box shadow creator
• Border radius tool
• Flexbox playground
• Grid layout builder
• Animation generator
• Export CSS code

Features:

• Live preview
• Copy CSS
• Preset templates
• Responsive preview

37 - Regular Expression Tester

Tech Stack: Vue.js, JavaScript

Regex testing tool:

• Real-time matching
• Highlighted matches
• Explanation of patterns
• Common regex library
• Test strings
• Export regex
• Language-specific syntax

Features:

• Match/group highlighting
• Replacement tester
• Regex debugger
• Save favorite patterns

38-40: Converter Tools

38 - Unit Converter

Tech Stack: React, TypeScript

Multi-purpose converter:

• Length (m, ft, in, cm)
• Weight (kg, lb, oz)
• Temperature (°C, °F, K)
• Data (MB, GB, TB)
• Speed (m/s, km/h, mph)
• Time (sec, min, hours)
• Currency (live rates)

Features:

• Real-time conversion
• Multiple units
• Copy result
• Conversion history

39 - Color Converter

Tech Stack: React, JavaScript

Color format converter:

• HEX ↔ RGB ↔ HSL
• Color picker
• Palette generator
• Contrast checker
• Accessibility check
• Export as CSS/Sass
• Color harmony finder

Features:

• Visual color picker
• Multiple formats
• WCAG compliance
• Palette suggestions

40 - Markdown Editor

Tech Stack: React, MDX

Markdown writing tool:

• Live preview
• Syntax highlighting
• Export as HTML/PDF
• Template library
• Word count
• Dark mode
• Auto-save

Features:

• Split view
• Toolbar shortcuts
• Table of contents
• Image upload
• GitHub Flavored Markdown

41-43: Generator Tools

41 - QR Code Generator

Tech Stack: React, QRCode Library

QR code creator:

• Text to QR code
• URL to QR code
• Custom colors
• Size adjustment
• Error correction levels
• Download as PNG/SVG
• Bulk generation

Features:

• Multiple formats
• Logo embedding
• Vector export
• Scan testing

42 - Password Generator

Tech Stack: React, TypeScript

Security tool:

• Customizable length
• Character options (uppercase, lowercase, numbers, symbols)
• Exclude similar characters
• Password strength meter
• Generate multiple
• Copy to clipboard
• Password history

Features:

• Entropy calculation
• Strength indicator
• Pronounceable option
• Passphrase mode

43 - Lorem Ipsum Generator

Tech Stack: React, JavaScript

Content placeholder tool:

• Paragraph generation
• Word count control
• Multiple themes
• HTML/format options
• Copy to clipboard
• Custom templates
• Fake data generator (names, emails, dates)

Features:

• Various languages
• Rich text format
• Code snippets
• Image placeholders

44: Developer Utilities

44 - Browser DevTools Extension

Tech Stack: TypeScript, Chrome Extension API

Developer productivity:

• DOM inspector
• Network monitor
• Console enhancements
• Performance profiler
• Color picker
• Ruler tool
• Screenshot capture

Features:

• Element highlighting
• CSS editor
• JavaScript console
• Request/response viewer
• Timeline recording

🎨 Common UI Patterns

Input Forms

• Text Inputs - Single line, multi-line
• File Upload - Drag & drop, click to upload
• Select Dropdowns - Single/multiple selection
• Toggle Switches - On/off options
• Sliders - Numeric ranges
• Color Pickers - Visual color selection

Output Display

• Code Blocks - Syntax highlighted
• Previews - Live result display
• Tables - Structured data
• Cards - Information blocks
• Modals - Detailed views
• Toasts - Notifications

Interactions

• Copy Buttons - One-click copy
• Download Links - File downloads
• Clear/Reset - Start over
• Undo/Redo - History navigation
• Save/Load - Persistence

🔧 Technical Concepts

File Processing

// Handle file upload
const handleFile = (file) => {
  const reader = new FileReader()
  reader.onload = (e) => {
    const content = e.target.result
    processContent(content)
  }
  reader.readAsText(file)
}

Clipboard API

// Copy to clipboard
navigator.clipboard.writeText(text)

// Read from clipboard
navigator.clipboard.readText()

Download Generation

// Trigger download
const downloadFile = (content, filename, type) => {
  const blob = new Blob([content], { type })
  const url = URL.createObjectURL(blob)
  const a = document.createElement('a')
  a.href = url
  a.download = filename
  a.click()
}

📊 Tech Stack Summary

🎯 Key Features

Real-Time Processing

• Instant feedback
• Live preview
• Dynamic updates
• Progressive results

User Experience

• Clean interface
• Fast operations
• Mobile responsive
• Accessible controls

Data Handling

• Input validation
• Error handling
• Edge case management
• Performance optimization

Export Options

• Copy to clipboard
• Download as file
• Shareable links
• Print-friendly

📚 What You'll Learn

Building these tools teaches you:

• DOM Manipulation - Direct browser interaction
• File Handling - Upload, read, process files
• Data Transformation - Convert between formats
• User Input - Forms, validation, feedback
• Performance - Efficient processing
• Browser APIs - Clipboard, download, storage
• Regex - Pattern matching
• Algorithm Design - Conversion logic

🔧 Setup & Run

# Clone any tool project
git clone [repository-url]

# Install dependencies
npm install

# Start development server
npm run dev

# Build for production
npm run build

🌐 Deployment

Tools deploy easily as static sites:

• Netlify - Drag & drop deployment
• Vercel - Git integration
• Cloudflare Pages - Edge deployment
• GitHub Pages - Free hosting

See Deployment Guide

🎨 Design Considerations

User Interface

• Simplicity - Minimal, focused design
• Clarity - Clear labels and instructions
• Consistency - Uniform patterns
• Feedback - Immediate response

Accessibility

• Keyboard Navigation - Full keyboard support
• Screen Readers - ARIA labels
• Color Contrast - WCAG AA compliant
• Focus States - Visible indicators

Performance

• Code Splitting - Load only needed code
• Lazy Loading - Defer non-critical features
• Caching - Store results
• Web Workers - Background processing

🚀 Advanced Features

PWA Support

• Install as app
• Offline functionality
• Push notifications
• Background sync

Data Persistence

• Local storage
• IndexedDB
• Cloud sync
• Export/import settings

Integrations

• Browser extensions
• API integrations
• Third-party services
• Webhooks

Next: Explore Starters