🔒 Privacy Policy

Last updated: February 25, 2026

The Short Version

Your data stays on your device. We don't collect it, we don't upload it, we don't sell it. Period.

How Our Tools Work

All NullKit tools (including those on subdomains like guandan.nullkit.com and pitch.nullkit.com) run entirely in your browser using client-side technologies like JavaScript, WebAssembly, Web Audio API, and WebGL. When you use our tools:

• Files you open are processed locally — they are never uploaded to any server
• Audio from your microphone is analyzed locally — we never record or transmit it
• Webcam video stays in your browser — we never capture or store it
• Game progress and preferences are saved in your browser's local storage only

What We Do Collect

We use the following third-party services that may collect anonymous usage data:

• Google Analytics — Collects anonymous page view data (pages visited, time spent, device type, country). This helps us understand which tools are popular and how to improve them. You can opt out using browser extensions like Google Analytics Opt-out.
• Google AdSense — May display ads and use cookies for ad personalization. You can manage ad preferences at Google Ad Settings.
• Cloudflare — Our hosting provider may collect standard web server logs (IP address, user agent, pages requested) for security and performance purposes.

Cookies

NullKit itself does not set any cookies. However, third-party services (Google Analytics, Google AdSense, Cloudflare) may set cookies for analytics and ad personalization. You can control cookies through your browser settings.

Data Storage

Some tools use your browser's localStorage to save preferences and progress (e.g., game scores, setlists). This data:

• Never leaves your device
• Can be cleared by clearing your browser data
• Is not accessible to us or any third party

Children's Privacy

NullKit is intended for general audiences. We do not knowingly collect personal information from children under 13.

Changes

We may update this policy as we add new tools or services. Significant changes will be noted with an updated date at the top.

Contact

Questions about this privacy policy? Reach out through any of our tool pages or project repositories.