Netcheck

About

This tool is for visualising the frequency of intermittent problems with your internet connection.

It checks your internet connection every second for a maximum of 24 hours, and draws a small 1 pixel line for each sample, color-coded with the round-trip time of a tiny websocket message between your browser and my server near Paris.

Save the graph by right-clicking on it and selecting "Save Image As...". The start timestamp is included on the image.

Each pixel-width corresponds to 1 second, each line corresponds to 10 minutes. The lines will be grouped by hour and 6 hours.

Recommended browser: Chrome. Firefox doesn't work properly if the window is in the background.

Legend

< 30 ms
30 - 300 ms
300 ms - 3 s
3 - 30 s
> 30, timeout
no data