jcd-signature-svelte-web — Privacy-first Email Signature Generator

Open-source email signature generator — 100% frontend, no backend, no data storage.

Build privacy-first, fully customizable email signatures without relying on external services.

🌐 Live demo:
https://signature.juancamilofarfan.com

⭐ If this project helps you, consider giving it a star on GitHub.

✨ Why this project?

Most online email signature generators:

• Store your data on servers
• Require accounts
• Limit customization
• Produce incompatible HTML

This project is different:

• ✅ 100% frontend
• ✅ No backend
• ✅ No database
• ✅ No tracking
• ✅ No information is stored anywhere

Your data stays in your browser.
You can export it as JSON and load it again anytime.

Privacy-first by design.

🚀 Features

• Export HTML ready for Gmail / Outlook
• Export PNG optimized for mobile clients
• Save and load configuration as JSON
• 6 templates
• 2 visual styles (classic, minimal)
• Typography, font size and color controls
• Avatar/logo via file upload or URL
• Social links (LinkedIn, X/Twitter, GitHub, Instagram, YouTube, WhatsApp)
• Optional CTA
• Editable legal disclaimer
• Reset to defaults

Works for:

⚖️ Legal
🏥 Healthcare
🌱 NGOs
🏢 Corporate
👨‍💻 Developers

📸 Screenshots

Main application view

Export panel

Example signatures

Example JSON files

You can find signature configuration files in assets/json/. Here's an example:

{
  "firstName": "John",
  "lastName": "Doe",
  "jobTitle": "Full Stack Developer",
  "department": "",
  "company": "Tech Company",
  "email": "[email protected]",
  "officePhone": "",
  "mobilePhone": "",
  "website": "https://techcompany.com",
  "avatarUrl": "",
  "logoUrl": "",
  "social": {
    "linkedin": "",
    "twitter": "",
    "github": "",
    "instagram": "",
    "youtube": "",
    "whatsapp": ""
  },
  "ctaText": "",
  "ctaUrl": "",
  "layout": 1,
  "style": "classic",
  "primaryColor": "#6366f1",
  "textColor": "#374151",
  "linkColor": "#6366f1",
  "fontFamily": "Arial, sans-serif",
  "googleFontUrl": "",
  "fontSize": 14,
  "disclaimer": "This email and any attachments are confidential and intended solely for the use of the individual to whom they are addressed. If you have received this email in error, please notify the sender immediately and delete it from your system."
}

Complete files:

• signature-maría-fernanda-rojas.json
• signature-daniel-castillo.json
• signature-dr.-andrés-morales.json
• signature-laura-gómez.json

🔐 Data & Privacy

This tool does not:

• Save data in a database
• Send requests to a server
• Store information remotely

All configuration lives in the browser session.

You can:

• Export configuration as .json
• Load it anytime
• Edit your signature whenever needed

Total control.

🧠 Architecture overview

1. Form updates global state (signatureStore)
2. Reactive rendering updates PreviewPanel
3. Templates are isolated components
4. ExportPanel handles HTML, PNG and JSON operations

State is serializable and export logic is decoupled from UI.

🛠 Tech stack

📦 Installation

git clone https://github.com/juancadev-io/jcd-signature-svelte-web
cd jcd-signature-svelte-web
npm install
npm run dev

Open: http://localhost:5173

🤝 Contributing

Contributions are welcome.

1. Fork the repo
2. Create a feature branch
3. Open a PR

For major changes, please open an issue first.

⭐ Support the project

If you find this useful:

• Give it a ⭐ on GitHub
• Share it with your team
• Open an issue with suggestions
• Submit a PR

Let’s build a flexible, privacy-first signature tool together.

License

MIT · Made with ❤️ by Juancadev