Online tools for testing web pages. Primarily for load speed
- GTmetric page load using both PageSpeed and YSlow
- Google PageSpeed Insights for analyzing load speed
- Web Page Test test more than just the page load
- Pingdom Website Speed Test another tool to test load speed
- Meta Tags test and preview how Open Graph tags shows a webpage on social media
- LinkedIn Post Inspector shows information about how a post with a link will preview on LinkedIn
- Google Search Console for monitoring a sites presence in Google search
- ToS;DR - Terms of Service; Didn't Read for looking up a readable summary of the ToS for popular websites
- EFF Cover Your Tracks test how trackers view your browser
- Track This by Mozilla