30+ free developer tools & productivity apps. All browser-based, no signup required.
Live: tools.zcus.dev
| Tool | Description |
|---|---|
| 🔧 JSON Formatter | Format, validate, minify JSON. CSV & YAML export |
| 📝 Regex Tester | Real-time regex testing with capture groups |
| 🔐 Base64 Tool | Base64/URL/HTML entity encode & decode |
| #️⃣ Hash Generator | MD5, SHA-1/256/384/512 hash generation |
| 🔤 Text Transform | camelCase, snake_case, kebab-case & more |
| 📋 Markdown Editor | Live split-pane markdown editor |
| 📄 Markdown → PDF | Convert markdown to PDF/HTML |
| 🕐 Timestamp Converter | Unix ↔ human readable, relative time |
| 🆔 UUID Generator | UUID v4 with batch mode |
| 🔑 JWT Decoder | Decode JWT tokens with expiry check |
| 🌐 HTML Preview | Live HTML/CSS/JS editor with preview |
| 🎨 CSS Playground | Interactive CSS property playground |
| 📝 Text Diff | Line-level text comparison |
| &️ HTML Entity | HTML entity encode/decode |
| 📰 Lorem Generator | Placeholder text in EN/LN/ID |
| Tool | Description |
|---|---|
| 🏷️ SEO Meta Tags | OG tags, Twitter cards generator |
| 📧 Email Template | Email template builder |
| 📱 QR Generator | QR code with custom colors |
| 🎨 Color Palette | Color palette generator |
| ⭐ Favicon Generator | Generate favicons from text/emoji |
| Tool | Description |
|---|---|
| 📊 CSV Viewer | View, sort, filter CSV data |
| ⚡ JSON Diff | Compare JSON objects visually |
| 🏥 API Health | Monitor API endpoints |
| 🔍 DNS Lookup | DNS records via Cloudflare DoH |
| 🖼️ Image Compressor | Compress images in-browser |
| Tool | Description |
|---|---|
| 🔐 Password Generator | Secure passwords with strength meter |
| 💰 Expense Tracker | Income/expense tracking with charts |
| 📋 Todo Kanban | Kanban board with drag & drop |
| 📝 Notes App | Rich text notes with search |
| 🔖 Bookmark Manager | Organize bookmarks with categories |
- Pure HTML/CSS/JavaScript (no frameworks)
- Single-file SPA architecture
- localStorage for persistence
- Web Crypto API for hashing
- Canvas API for QR/image processing
- Consistent design system (Inter font, #FF6B00 accent)
All apps are static files. Deploy anywhere:
# nginx
cp -r * /var/www/tools/
# or any static server
npx serve .MIT — Free to use, modify, and distribute.
Built by ZCUS