DevTools Desktop

Offline-first developer utilities for macOS, Windows, and Linux. No cloud dependencies, no data collection.

Features

Text & Code

• JSON Viewer - Format, validate, and minify JSON with syntax highlighting
• Text Compare - Diff viewer with line-by-line comparison

Side by Side	Unified

• Case Converter - Transform between camelCase, snake_case, kebab-case, and more
• SQL Formatter - Format SQL queries with customizable indentation
• Markdown Editor - Live preview with export support
• Code Playground - Multi-language editor (JS, HTML, CSS, JSON, Markdown)

Converters

• Base64 - Encode/decode text and files
• URL Encoder - Encode/decode URLs and URI components
• CSV ↔ JSON - Bidirectional conversion with custom delimiters
• JSON → TypeScript - Generate TypeScript interfaces from JSON
• Number Base - Convert between decimal, binary, octal, hex

Generators

• UUID - Generate v1/v4 UUIDs with batch support
• Hash - MD5, SHA-1, SHA-256, SHA-512
• Password - Of different length and strength
• QR Code - Generate QR codes with custom size and error correction
• Color Palette - Create monochromatic, analogous, complementary schemes
• Lorem Ipsum - Generate placeholder text

Developer Utilities

• JWT Decoder - Decode and inspect JWT tokens
• Regex Builder - Interactive regex construction with live testing
• Cron Parser - Build cron expressions with plain English descriptions
• Timestamp Converter - Unix timestamp conversion with multiple formats
• Image Converter - Convert between PNG, JPEG, WebP, BMP

UI

• Pin a tool in the menu

Quick Start

# Clone and install
git clone https://github.com/me-shaon/devtools.git
cd devtools
npm install

# Run locally
npm start

# Build for distribution
npm run dist

Requirements

• Node.js 14+
• npm or yarn

Architecture

src/
├── main.js              # Electron main process
└── renderer/
    ├── index.html       # Single-page application
    ├── styles/          # CSS modules
    └── js/
        ├── main.js      # App router and state
        └── tools/       # Tool implementations (21 modules)

Each tool is a self-contained module with no external dependencies. All processing happens client-side.

Development

Adding a Tool

1. Create module in src/renderer/js/tools/
2. Add HTML section in index.html
3. Register in navigation sidebar
4. Add menu item in src/main.js

Build Scripts

npm start          # Development server
npm run build      # Build executable
npm run pack       # Package without distributing
npm run dist       # Create installer

Tech Stack

• Electron 22+ for desktop runtime
• Vanilla JavaScript (ES6+)
• No framework dependencies
• No analytics or telemetry

Contributing

Pull requests welcome. For major changes, open an issue first.

License

MIT