ReactionMetric
Free browser reaction-time benchmark with device context
About ReactionMetric
ReactionMetric is a free browser-based reaction-time benchmark. Complete five trials to see median, best and consistency results. The site explains how browser and device latency affect measurements. The core test works without mandatory signup. Built with Codex under human direction, including AI-assisted code and graphics; the reaction tests use browser timing rather than an AI model.
What ReactionMetric does
AINave analysisMeasures simple visual reaction time in a web browser over five trials and reports the median, best result and consistency.
- Best for
- People checking their reaction timePeople tracking repeat results on one device setup
- Use it to
- Measure simple visual reaction time
- Track a personal baseline over repeated tests
- Compare results on the same display and input setup
- Compare visual, keyboard and auditory response tests
- Practice reaction time with a training block
Show you're on AINave
Add the badge to ReactionMetric's site. It links back to this page.