🔧 JieBang Tools

Free online tools that respect your privacy.

150+ utilities for developers, designers, and everyday users.

🌐 Live Site · 📖 API Docs · 🐛 Report Bug · ✨ Request Feature

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Why JieBang?

Most online tools require sign-up, upload your files to servers, or bombard you with ads. JieBang is different:

• 100% Client-Side — Your files never leave your browser. Period.
• No Sign-Up — Open and use. No accounts, no cookies, no tracking.
• No Server Processing — Everything runs in your browser using JavaScript.
• Free & Open Source — MIT licensed. Fork it, self-host it, modify it.
• Dark Mode — Easy on the eyes, always.
• Mobile Friendly — Works on any device with a modern browser.

Featured Tools

Developer Tools

Tool	Description
JSON Formatter	Format, validate, and minify JSON with syntax highlighting
Base64 Encoder	Encode/decode Base64 for text and files
URL Encoder	Encode/decode URLs and query parameters
JWT Decoder	Decode and inspect JWT tokens instantly
Cron Expression Generator	Build and understand cron expressions visually
Regex Tester	Test regular expressions with real-time matching
Hash Generator	Generate MD5, SHA-1, SHA-256, SHA-512 hashes
Markdown Preview	Write and preview Markdown with live rendering

Image Tools

Tool	Description
Image Converter	Convert between HEIC, PNG, JPG, WebP, BMP, GIF — no upload needed
Image Compressor	Compress images with adjustable quality, batch support
QR Code Generator	Generate QR codes with logos, WiFi, vCard, SVG export
Color Picker	Pick colors from screen, WCAG contrast checker, palette export
Watermark Remover	Remove image/video watermarks with preset positions

Document Tools

Tool	Description
PDF Toolkit	Merge, split, rotate, add watermark — all in browser
YAML/JSON Converter	Convert between YAML and JSON formats

SEO & Web Tools

Tool	Description
SEO Analyzer	Check meta tags, headings, and SEO health
Sitemap Generator	Generate XML sitemaps from URLs

View all 150+ tools →

Tech Stack

• Frontend: Vanilla HTML5, CSS3, JavaScript (no framework bloat)
• Styling: Custom CSS with dark mode support
• Hosting: Cloudflare Pages (global CDN, edge caching)
• API: RESTful API with free tier (100 requests/day)
• MCP: Model Context Protocol server for AI assistant integration

Quick Start

Use Online

Visit www.jiebang.site — no installation needed.

Self-Host

# Clone the repository
git clone https://github.com/jiebang-tools/tools.git
cd tools

# Serve locally (any static file server works)
python3 -m http.server 8080
# Or use Node.js
npx serve .

Open http://localhost:8080 in your browser.

API Access

# Free tier: 100 requests/day
curl "https://www.jiebang.site/api/qrcode?text=Hello&size=200"

# Pro tier: 5,000 requests/day for $1.99/month
curl -H "Authorization: Bearer YOUR_API_KEY" \
     "https://www.jiebang.site/api/qrcode?text=Hello&size=200"

See API Documentation for all endpoints.

MCP Integration

JieBang provides an MCP server for AI assistants:

# Add to your MCP client config
{
  "mcpServers": {
    "jiebang": {
      "url": "https://www.jiebang.site/mcp"
    }
  }
}

Project Structure

├── index.html              # Homepage (Chinese)
├── en/                     # English version
├── tools/                  # Chinese tool pages
│   ├── json-formatter.html
│   ├── image-convert.html
│   ├── pdf-toolkit.html
│   └── ...
├── en/tools/               # English tool pages
├── css/
│   └── style.css           # Global styles
├── js/
│   └── common.js           # Shared utilities
├── api/                    # API serverless functions
├── functions/              # Cloudflare Pages Functions
├── _headers                # CDN cache rules
├── _redirects              # URL redirects
└── sitemap.xml             # SEO sitemap

Contributing

Contributions are welcome! Here's how you can help:

1. Report bugs — Open an issue
2. Suggest tools — Request a feature
3. Submit code — Fork, create a branch, and open a Pull Request
4. Improve docs — Fix typos, add examples, translate content

Privacy Policy

JieBang processes everything in your browser. We do not:

• Upload your files to any server
• Store your data after you close the tab
• Track you with cookies or analytics identifiers
• Share any information with third parties

The only server interaction is serving static files and (optionally) API requests.

License

This project is licensed under the MIT License — see the LICENSE file for details.

Links

• 🌐 Website: www.jiebang.site
• 📖 API Docs: www.jiebang.site/api-docs
• 🤖 MCP Server: www.jiebang.site/mcp
• 💬 Feedback: GitHub Issues

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