Focused Input Diagnostics
InputMetric is a collection of browser-based tools for checking mouse and keyboard input. Common symptoms have dedicated tests for buttons, polling rate, double clicks, scroll direction, rollover and repeated key events.
The site shows what the browser receives, explains calculated values and makes clear what a web page cannot measure. Core tests need no account or installed software.
How We Interpret Results
A result is a clue to investigate, not an automatic hardware verdict. Repeated runs and comparisons with another browser, port or device are more useful than a single unusual event.
Read the methodology for timing definitions and the limits of browser measurements.