# ControllerTest — privacy and data handling

Canonical page: https://controllertestonline.com/privacy/
Language: English
Last updated: 2026-10-29

ControllerTest is designed so controller diagnostics run locally in your browser. This policy explains what the site does and does not collect.

## Local controller diagnostics

The controller test reads Gamepad API input in your browser. Button states, stick values, trigger values, drift samples, circularity paths, reports, JSON, CSV and share cards are generated on your device.

The v1 site does not create user accounts and does not intentionally upload controller diagnostic data to a server.

## Operational data

Like most websites, hosting infrastructure may process basic request data such as IP address, URL, user agent, referrer and timestamps for security, debugging and delivery.

ControllerTest uses Google Analytics 4 to understand aggregate page usage, language mix, browser classes, referrers and navigation patterns. GA4 is not used to upload controller diagnostic readings, exported reports or share-card data.

## Cookies and third parties

The diagnostic tool does not require cookies to run. Google Analytics 4 may use cookies or similar storage for measurement.

ControllerTest uses Google AdSense to display ads. Google and other third-party vendors may use cookies to serve ads based on a user's previous visits to this site or other websites.

Users can manage or opt out of personalized advertising through Google Ads Settings at https://adssettings.google.com/.

When a completed stick drift test finds high drift, the result can show Amazon links to Hall effect replacement sticks and controllers. As an Amazon Associate, ControllerTest earns from qualifying purchases. These links appear only after a test result, no diagnostic readings are sent to Amazon, and Amazon applies its own privacy policy and cookies after you click.

External links, browser extensions, manufacturer software and third-party sites are governed by their own privacy policies.

## Contact and updates

For privacy questions, contact support@controllertestonline.com.

This policy may be updated when product features, hosting, analytics or advertising integrations change. The updated date on this page will reflect material revisions.

## AI assistant links

Opening a footer AI link passes a preset public website question to the selected third-party service. The link does not include controller readings, reports, device identifiers or account data. Copying the prompt writes that same public question to the clipboard. If the user later pastes a diagnostic report into an AI service, that service's privacy terms apply.

Footer interaction events record the selected guide or AI provider and website language in the existing analytics service, without controller diagnostic values or prompt text.

## Related guides

- [tools.md](https://controllertestonline.com/tools.md)
- [methodology.md](https://controllertestonline.com/methodology.md)
- [compatibility.md](https://controllertestonline.com/compatibility.md)
- [pricing.md](https://controllertestonline.com/pricing.md)
- [Document index](https://controllertestonline.com/llms.txt)
- [Complete guide](https://controllertestonline.com/llms-full.txt)