SEO diagnostic tools come and go, but in 2016 there’s a still a great range of old favorites, and some newer sites that you can be using to check how your site is performing.
No list of SEO diagnostic tools is complete without the granddaddy of them all;
Google Webmaster Tools allows you to track your sites overall performance, but includes tools such as Fetch for Google. Fetch allows you to see your site as Google sees it, which is vital when tracking SEO performance.
PageSpeed Insights allows you to measure the performance of your mobile and desktop sites in terms of speed, a particularly important factor given that Google now considers speed as a factor when ranking mobile sites.
Found delivers an automated SEO audit, and provides feedback on technical issues such as domain canonicalization; content issues such as keywords and meta data, and external link analysis.
A simple to use SEO auditing tool that delivers information on domain strength, links, image SEO, social counts, mentions, technical SEO, page speed and various other aspects that can be useful in getting a broader picture of your own site, or even that of competitors.
This paid service offers a higher level of diagnostics. It takes into account existing SEO initiatives, social media, usability and other aspects of a site.
A handy tool in being able to not only diagnose your own site but compare it against your competitors, as well.
The service analyzes rank, link building, accessibility, trust, and indexing.
Another comparison tool that is able to crawl multiple websites and look for common SEO issues, useful for both your own websites, and seeing how your competitors are doing it.