Last week I needed to audit a client site — check broken links, verify schema, sanity-check a sitemap, spot-check indexing on 40 URLs. Nothing exotic. I opened Google, typed the obvious queries, and clicked whatever ranked.
Four hours later I had my report, but I also had a very long list of ways free SEO tools are quietly broken. Not "missing features" broken — actively misleading broken. This post is that list, because I ended up building ToolsVale around the fixes and I think the pattern is worth writing down whether you build tools or just use them.
The setup
Twelve tools total, spread across the four jobs above: broken link checkers, schema validators, sitemap generators, indexing checkers. For each one I gave the same input a real site would give: 500 URLs for the link checker, a live JSON-LD block for the schema tool, an existing sitemap for the generator, 40 URLs for the indexing check.
I noted every single thing that broke, gated, or gave me an answer I couldn't trust. I'm not naming names — this is about pattern, not takedown — but if you've used a free SEO tool recently you've hit at least four of these.
