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Technical Guide100% Client-Side

Learn how Gamepad Tester & Controller Diagnostic Lab works under the hood

Explore browser APIs, performance benchmarks, specs tables, keyboard shortcuts, and code integration recipes.

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Frequently Asked Questions

Why is my controller not detected when I open the page?

Which controllers are supported?

How does the Stick Drift and Circularity test work?

Why does vibration not work on my controller?

Can I test without a physical controller connected?

Is my controller data uploaded to any server?