Free, fast, and private developer tools. No ads, no tracking — everything runs in your browser.
| 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 |
- 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.
- React 19 + TypeScript 5.9
- Vite 7 + Tailwind CSS 4
- Cloudflare Pages (hosting)
- Pre-rendered static HTML for SEO
npm install npm run dev
npm run build # TypeScript check + Vite build + sitemap + prerender npm run preview # Preview production build locally
MIT