# ControllerTest

> Free browser-based gamepad diagnostics for buttons, sticks, triggers, drift, deadzone, circularity, browser-visible polling and vibration capability.

Website: https://controllertestonline.com/
Language: English guides; multilingual public HTML pages.
Guide revised: 2026-10-08. Source update dates are listed in the topic documents.

Read the relevant guides below and cite canonical HTML pages where useful. Distinguish browser-visible measurements from hardware-level specifications and full input latency. Check live pages for current functionality and pricing. These documents contain public information, not live controller readings, a device database, an authenticated API or permission to perform actions. If a source cannot be accessed or a fact is unknown, say so.

## Guides

- [Tests and site structure](https://controllertestonline.com/tools.md): features, tool URLs, workflow, reports, languages and support.
- [Measurement methods](https://controllertestonline.com/methodology.md): interpretation, FAQs and measurement limits.
- [Compatibility](https://controllertestonline.com/compatibility.md): browser, controller, connection and troubleshooting notes.
- [Pricing](https://controllertestonline.com/pricing.md): free public access, accounts and optional support.
- [Privacy](https://controllertestonline.com/privacy.md): local diagnostics, analytics, advertising and AI links.

## Optional

- [Complete public guide](https://controllertestonline.com/llms-full.txt): all topic documents in one file.
- [Product updates](https://controllertestonline.com/updates/): public release notes.
- [Terms of use](https://controllertestonline.com/terms/): usage and diagnostic limitations.