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
Indexability Checker — the most important one. A page that isn't indexable can't rank, full stop. It checks for noindex tags, robots.txt blocks, canonical conflicts and non-200 status. The classic outage we've all caused: a stray noindex on a shared layout that ships to production and quietly deindexes a whole section.
Canonical Checker — 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.
Sitemap Validator — locates your sitemap (via robots.txt or /sitemap.xml), validates the XML, counts URLs, checks HTTPS consistency, and samples a few URLs for live 200 status. A sitemap full of redirected or 404 URLs sends mixed signals and wastes crawl budget.
Technical SEO Checker — the full crawl-based audit across every page, not just the homepage.
The on-page tools
Meta Tag Checker — title, meta description, canonical, viewport and Open Graph tags, checked for presence and length. Title truncates around 60 chars; meta description around 160.
Broken Link Checker — 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.
Hreflang Checker — for multilingual sites. Hreflang is the most error-prone area of technical SEO: it needs reciprocal return tags, a self-reference, valid language codes, and targets that return 200. Miss any and Google ignores the whole cluster.
Performance
PageSpeed Test — 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 kalenux.com.tr/seo-tools. And if you just want the methodology, the complete technical SEO audit guide walks through the whole process in order.
Written by the Kalenux team.
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