If you run a web site, or you're trying to fix a problem for someone who does, then you need a decent set of troubleshooting tools to hand. You'll want to check that the SSL certificate is working properly. You'll need to know that the site is accessible, at an acceptable speed, from various locations around the world. Maybe you want to know the location of the server which hosts the site, or check that it's not still vulnerable to the Heartbleed bug. Perhaps you want a breakdown of how fast your page loads on a variety of hardware platforms at a selection of speeds.

If so, then help is at hand. Here's a great collection of network and web site troubleshooting features, all accessible for free via your browser. And even if you don't run a web site yourself, try the tools against some of your favourite sites to learn more about how the internet and the web works.   Read More