Free browser tools
The tests are free to use and run in your browser. No account or software installation is required. Each test can measure only the signals available through your browser, and access to a camera or microphone requires your permission.
Results and measurement limits
Results are for reference only. They depend on your device, browser, operating system and test conditions. A result does not confirm that hardware is fault-free or identify every possible fault. Results and guides do not constitute repair advice, a warranty assessment or authorisation for a warranty claim. We do not guarantee a repair or a particular test outcome. Follow the device manufacturer's instructions and contact its support service when you need a repair or warranty decision.
Device operation and flashing colours
You decide whether to start a test, grant permissions or change device settings. You are responsible for those actions and assume the risks of operating your device. Read the warnings and measurement limits on each tool before starting, and stop if a test causes discomfort.
The stuck pixel fixer carries this warning: This test flashes rapidly changing colours. Do not use it if you or anyone watching has photosensitive epilepsy.
Third-party advertising and links
When advertising is enabled, the site may display advertisements provided by Google AdSense. The site also links to third-party websites. We do not control their content, services or terms. An advertisement or link does not guarantee a third party's claims or a product's suitability. Review the third party's own terms and privacy information before using its services.
The privacy page explains local test data handling and the Google services that may be enabled.
Changes to tools and terms
Tools, guides and these terms may be updated as browser support and site content change. We do not guarantee uninterrupted availability. Updated terms will be posted on this page with a revised effective date. Review this page when you use the site.
Contact
For questions about these terms or a test result, use the contact details on the contact page.