DevToolkit

Free, fast, and private developer tools. No ads, no tracking — everything runs in your browser.

devtoolkit-dws.pages.dev

Tools

Tool	Description
JSON Formatter	Format, validate, and minify JSON with syntax highlighting
Base64 Encoder/Decoder	Encode and decode Base64 strings
Cron Expression Parser	Parse and explain cron expressions with next run times
JWT Decoder	Decode and inspect JSON Web Tokens
URL Encoder/Decoder	Encode and decode URL components
UUID Generator	Generate v4 UUIDs in bulk
Timestamp Converter	Convert between Unix timestamps and human-readable dates
Hash Generator	Generate MD5, SHA-1, SHA-256, SHA-512 hashes
Password Generator	Generate secure passwords with customizable rules
Text Diff Checker	Compare two texts side-by-side with highlighted differences
Regex Tester	Test regular expressions with real-time matching and flag controls
Color Converter	Convert between HEX, RGB, HSL with WCAG contrast checking

Features

• 100% Client-Side — Nothing leaves your browser. Zero server-side processing.
• No Ads, No Tracking — No analytics, no cookies, no third-party scripts.
• Fast — Static pre-rendered pages. No loading spinners.
• 12 Tools — And growing.

Tech Stack

• React 19 + TypeScript 5.9
• Vite 7 + Tailwind CSS 4
• Cloudflare Pages (hosting)
• Pre-rendered static HTML for SEO

Development

npm install
npm run dev

Build

npm run build    # TypeScript check + Vite build + sitemap + prerender
npm run preview  # Preview production build locally

License

MIT