Privacy Statement
Updated: September 28, 2025
What We Collect
CZNull keeps your privacy simple. Here's what happens when you run our GPU tests:
Hardware Info
Your browser tells us your GPU type and what it can do:
- • GPU model and vendor (e.g., NVIDIA RTX 4090)
- • WebGL capabilities and extensions
- • Maximum texture size and render buffer dimensions
- • Shader precision and compute capabilities
Test Results
The scores and speeds from your benchmarks:
- • Frame rates (FPS) for each test
- • Completion times and performance scores
- • Error logs if tests fail (no personal data)
- • Comparison rankings (anonymous)
Basic Usage
Which tests you run and which pages you visit:
- • Test selection patterns
- • Time spent on each test
- • Browser type and version
- • Screen resolution (for rendering tests)
We don't ask for your name, email, or any personal details. You stay anonymous unless you choose to contact us.
How We Use It
We use this info to:
Show you accurate test results
- • Real-time FPS counters during tests
- • Detailed performance breakdowns
- • Comparisons with similar hardware
- • Percentile rankings in our database
Make our tests better
- • Optimize tests for different GPU architectures
- • Add new benchmarks based on usage patterns
- • Improve compatibility with new hardware
- • Balance test difficulty for all GPU tiers
Fix problems when things break
- • Debug WebGL compatibility issues
- • Identify browser-specific problems
- • Track down performance bottlenecks
- • Resolve test failures on specific GPUs
See general trends
- • Most popular GPUs among users
- • Average performance by GPU generation
- • Browser market share for WebGL
- • Test completion rates and difficulty
That's it. No selling data, no creepy tracking, no advertising profiles.
Security Made Simple
We keep things secure:
Everything uses HTTPS
That lock icon in your browser means all data is encrypted during transmission
No personal data storage
We don't store personal info because we don't collect it in the first place
Anonymous test results
Your benchmark scores can't be traced back to you - fully anonymous
Regular security audits
We regularly check our security measures and update them as needed
Other Services We Use
A few helpers we work with:
Analytics Services
- • Track which features get used most
- • Identify performance bottlenecks
- • Understand user flow patterns
- • All data is aggregated and anonymous
Content Delivery Network
- • Load the site faster worldwide
- • Cache static resources globally
- • Reduce latency for all users
- • Improve test loading times
Browser WebGL Access
- • Access GPU info with your permission
- • Run performance tests locally
- • Never sends raw hardware data
- • All processing happens in your browser
We picked these carefully - they all respect privacy and follow GDPR guidelines.
About Cookies
We use tiny bits of storage for:
Theme preferences
Remember if you like dark mode or light mode
Test results
Save your benchmark scores locally for comparison
Performance data
Keep tests running smoothly and efficiently
No tracking cookies. Clear your browser data anytime to remove everything.
Your Control
You have complete control over your data:
Use CZNull without giving us any info
- • No registration required ever
- • No email verification needed
- • No social media login prompts
- • Run tests completely anonymously
Clear your test history anytime
- • Browser clear cache = data gone
- • LocalStorage can be cleared manually
- • No server-side history retention
- • Fresh start whenever you want
Ask us about any data we might have
- • Email us for data requests
- • We'll respond within 48 hours
- • Full transparency on what we store
- • Export your data in JSON format
Tell us to delete anything
- • Right to erasure (GDPR compliant)
- • Deletion confirmed within 7 days
- • No questions asked
- • Permanent removal from all systems
It's your computer - you're in charge. We're just here to help test it.
For Kids
CZNull is for people who understand computer hardware testing. We don't knowingly collect info from kids under 13.
Updates
If we change this policy, we'll let you know on the site. No surprises.
Questions?
Got privacy questions? Just email us: