Privacy Policy
Last updated: December 12, 2025
Introduction
Welcome to Tools Tienng21 ("we," "our," or "us"). We are committed to protecting your privacy and ensuring the security of your personal information. This Privacy Policy explains how we collect, use, and safeguard your data when you use our website and online developer tools.
Data Processing
All data processing happens in your browser. Our tools are designed to run entirely client-side, which means:
- Your data never leaves your device
- We do not store, transmit, or have access to the content you process
- No server-side processing of your input data occurs
- Your sensitive information (JSON, passwords, encoded data, etc.) remains completely private
Information We Collect
While we don't collect your tool input data, we may collect limited information for website functionality and analytics:
- Usage Data: Anonymous analytics data such as page views, browser type, device type, and general location (country/region)
- Cookies: Essential cookies for theme preferences (light/dark mode) and basic site functionality
- Local Storage: Your preferences are stored locally in your browser
Third-Party Services
We may use the following third-party services:
- Google Analytics: To understand how visitors use our website and improve our services
- Google AdSense: To display relevant advertisements. Google may use cookies to serve ads based on your prior visits to our website or other websites
You can opt out of personalized advertising by visiting Google Ads Settings.
Cookies
We use cookies and similar technologies for:
- Remembering your theme preference (light/dark mode)
- Analytics and performance monitoring
- Advertising purposes (through Google AdSense)
You can control cookies through your browser settings. However, disabling cookies may affect some functionality of our website.
Data Security
Since all tool processing happens locally in your browser, your sensitive data is inherently protected. We use HTTPS encryption for all communications with our website. We do not store any user-generated content on our servers.
Children's Privacy
Our services are not directed to children under 13. We do not knowingly collect personal information from children under 13. If you are a parent or guardian and believe your child has provided us with personal information, please contact us.
Changes to This Policy
We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last updated" date.
Contact Us
If you have any questions about this Privacy Policy, please contact us at: Contact Page