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Test your reaction time with visual, aim, and sound modes. 5-round average with percentile ranking. Free online reflex test — measure your speed in milliseconds.
Reaction Time Test is a free online games tool that works right in your browser — whatever you enter is processed locally and never sent to a server. No installation, no signup; works on both phone and desktop, ready to use instantly.
We noticed most online tools upload your files to remote servers. Since privacy is our core principle, we built this tool to process everything locally in your browser.
Students and office workers stealing a short break between tasks. A quick browser challenge clears your head without the commitment of opening a full game or installing anything on your work machine.
Yes, completely free with no signup required.
Yes, it works on mobile browsers with touch support.
Games
Yes. Reaction Time Test is a pure front-end tool: whatever you type or paste is processed only in your browser's memory and never sent to a server. It disappears as soon as you refresh or close the page.
🔒 Privacy & Security：All processing happens locally in your browser. Files are never uploaded or stored.
🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.