Open Demand Letter

A free, open-source, privacy-first demand letter generator that runs entirely in your browser.

No accounts. No data collection. No servers storing your information. Your letter never leaves your device.

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What Is This?

A simple web app that helps you create a demand letter. Fill in what you know, leave blank what you don't, and download a ready-to-send letter. That's it.

A demand letter is a formal written request asking someone to fulfill an obligation — typically to pay money owed, fix a problem, or take a specific action. It's often the first step before legal action and can resolve disputes without going to court.

How It Works

1. Enter information (all fields optional):

   • To: Name, company, address, phone, email, fax, additional info
   • From: Name, company, address, phone, email, fax, additional info
   • Issue: Describe in plain language or select from common categories
   • Amount: The money being demanded
   • Deadline: When you need a response (defaults to 30 days)

2. Click Generate — your letter is created instantly in your browser.

3. Download — the file saves directly to your device.

Nothing is sent to any server. Ever.

Privacy

This project was built with a single obsession: your data stays on your machine.

• All letter generation happens in JavaScript, in your browser
• No form data is transmitted to any server
• No database, no accounts, no cookies tracking your activity
• The only data that can be shared is the demand amount — and only if you explicitly opt in after your letter is generated
• Basic web telemetry (page views, country-level geo) is handled automatically by Cloudflare — this contains no personal information and no letter content
• The source code is open for anyone to verify: View on GitHub

For the full privacy design, see docs/PRIVACY.md.

Fragment API (Link-Based Pre-Fill)

You can pre-fill the form by constructing a URL with hash parameters:

https://opendemandletter.com/app.html#to_name=John+Doe&amount=5000&issue=unpaid+invoice

The # fragment is never sent to the server — it's parsed entirely by JavaScript in your browser. This means you can share pre-filled links without any sensitive data touching our infrastructure.

Add &auto=1 to automatically generate and download the letter on page load.

Full parameter documentation: docs/FRAGMENT_API.md.

Tech Stack

Intentionally minimal:

• HTML — Semantic, accessible markup
• CSS — Mobile-first responsive design, no frameworks
• Vanilla JavaScript — No dependencies, no build step, no npm
• Cloudflare Pages — Static hosting with automatic HTTPS

No React. No Tailwind. No webpack. No node_modules. Just files that work.

Running Locally

# Clone the repo
git clone https://github.com/Cfomodz/Open-Demand-Letter.git
cd Open-Demand-Letter

# Serve with any static file server
python3 -m http.server 8000
# or
npx serve .
# or just open index.html in your browser

Contributing

Contributions are welcome! Please read CONTRIBUTING.md before submitting a PR.

The core principles are non-negotiable:

• Privacy-first (no data leaves the browser)
• Simplicity (no frameworks, no build steps)
• All fields remain optional
• No monetization, no accounts, no upsells

License

MIT — do whatever you want with it.

Disclaimer

This tool generates a basic demand letter template. It is not legal advice. For complex disputes or significant amounts, consult a licensed attorney in your jurisdiction. The generated letter is a starting point, not a substitute for professional legal counsel.