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Privacy Policy

Last updated: January 2026

Our Commitment to Privacy

At pythonbook.io, we take your privacy seriously. This Privacy Policy explains how we handle your information when you use our Service. The short version: we don't collect, store, or have access to your code. Everything runs in your browser.

1. Information We Don't Collect

Unlike most web services, pythonbook.io does NOT collect or store:

  • Your Python code
  • Your notebook content
  • Your files or projects
  • Personal information (no registration required)
  • Email addresses or contact information

Your code runs entirely in your browser using WebAssembly technology (Pyodide). It never leaves your device or gets transmitted to our servers.

2. Local Storage

When you use the auto-save feature, your code and settings are stored in your browser's local storage. This data:

  • Stays on your device only
  • Is never transmitted to our servers
  • Can be cleared at any time through your browser settings
  • Is isolated to pythonbook.io domain

3. Share URLs

When you use the "Share" feature:

  • Your code is compressed and embedded directly in the URL
  • The URL is generated entirely in your browser
  • We do not store or log shared URLs
  • Anyone with the URL can view and run the code
  • Treat share URLs like you would treat the code itself (don't share sensitive information)

4. Analytics and Cookies

We may use basic analytics (such as Google Analytics) to understand how visitors use the Service. This may include:

  • Page views and navigation patterns
  • Browser type and version
  • Operating system
  • Referrer information (how you found us)
  • Anonymous usage statistics

We do NOT track or log the content of your code through analytics. We only track general usage patterns to improve the Service.

5. Third-Party Services

The Service relies on:

  • Pyodide: Python runtime compiled to WebAssembly, runs entirely in your browser
  • CDN Services: To deliver static assets faster (CSS, JavaScript, fonts)
  • Hosting Provider: To serve the web application

These services may collect technical information (IP address, browser type) as part of standard web hosting. However, they do not have access to your code or notebook content.

6. Security

We implement security best practices including:

  • HTTPS encryption for all connections
  • Content Security Policy headers
  • Regular security updates
  • No server-side code execution or storage

Since your code never leaves your browser, you have full control over its security.

7. Children's Privacy

pythonbook.io does not knowingly collect personal information from children. Since we don't require registration and don't collect personal data, the Service can be safely used for educational purposes by students of all ages.

8. Your Rights

You have complete control over your data:

  • Your code is yours - we never access or store it
  • You can clear local storage anytime through your browser settings
  • You can export your work as ZIP, PDF, or HTML files
  • You can use the Service without creating an account

9. Data Retention

Since we don't collect your code or personal information:

  • There is no data for us to retain or delete
  • Your local storage data persists until you clear it
  • Analytics data may be retained according to the analytics provider's policy

10. International Users

pythonbook.io can be accessed from anywhere in the world. Since all code execution happens in your browser, no data crosses international borders through our Service.

11. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by updating the "Last updated" date. Continued use of the Service after changes constitutes acceptance of the updated policy.

12. Contact Us

If you have any questions about this Privacy Policy or our practices, please contact us at pythoncompileronline@gmail.com.

Summary

TL;DR: Your code runs in your browser. We never see it, store it, or transmit it to our servers. Auto-save uses local storage on your device. Share URLs contain your code directly in the URL. We may use analytics to improve the Service, but we never track your code content.