About

ReactionTest is a free, no-signup suite of browser-based human benchmark tests. The site started with a single reaction time test and is growing to include click speed (CPS), aim training, and more.

Everything runs in your browser. No accounts, no tracking, no data sent to a server. Your best scores are stored locally in your browser's storage and never leave your device.

Why we built this

Most reaction test sites on the web have the same flat, sterile UI they had a decade ago. We wanted something faster, more honest, and better-looking. The result is what you're using.

Sister project

We also run ColorMix, a free color palette tool for designers and illustrators.

Contact

Questions, feedback, or a feature request? Find us on social or use the contact details on the parent project.