We run 10+ web products. For years we paid for an SEO suite mostly to do one thing: technical audits. The keyword and backlink features sat unused while the bill renewed every month. So we built our own technical-audit engine — and then split the individual checks out into free, no-signup tools. Here's what each one does and the technical reasoning behind it.
All of them run an instant check on a URL with no account. Try them on your own site as you read.
The crawlability & indexing tools
— verifies rel=canonical is self-referencing and resolves to a live 200. The subtle bug it catches: a canonical pointing at a URL that then redirects. Google ignores those and picks its own canonical, so your signal is wasted. Common after an HTTP→HTTPS migration where canonicals weren't updated.
— the full crawl-based audit across every page, not just the homepage.
The on-page tools
— finds broken internal and outbound links plus redirect chains, with the source pages for each. Fixing broken links is the highest-return, lowest-effort technical task there is.
— real Core Web Vitals (LCP, CLS, INP) on your key templates, mobile and desktop. Test a product or category page, not just the homepage — those carry the traffic and usually score worst.
Why free, why no signup
The instant checks read one page (your homepage) and need no account, because the fastest way to show a tool is useful is to just let people use it. The full site-wide crawl is the paid product, but it's one-time pricing ($9-49, credits never expire) rather than a subscription — which was the whole point of building it. We were tired of paying monthly to re-audit our own properties.
If you maintain your own sites, the full toolbox lives at walks through the whole process in order.
Written by the Kalenux team.
SOCIAL SHARE CARD GENERATOR