What is the best free SEO tool?

Google Search Console is the best free SEO tool overall, since it comes straight from Google and shows real ranking positions, click through rates, and indexing errors for your actual site, data no third party tool can fully replicate.

Google's free Keyword Planner, built for ad campaigns, also works reasonably well for rough keyword volume estimates without a paid subscription. Several SEO platforms offer limited free tiers for basic site audits, though most cap the number of pages or checks per month.

Free tools cover the fundamentals well but rarely include AI citation tracking yet, since that category is new enough that most tools tracking it charge for access.

Compare that with GEO softwarebefore assuming free tools cover everything you need.