1. Google Search Console

2. Screaming Frog

3. Lighthouse Chrome

4. Structured data testing tool

5. Webpagetest.org

6. Kraken.io

7. TinyPNG

8. Ahrefs free tools

9. Ubersuggest

10. Keywords everywhere

11. What’s my SERP

12. Mozbar

13. SERP Simulator

14. Check my links Chrome Extension

15. Link explorer By Moz

16. Redirect Path Chrome Extension