About SEO Toolbox Online

SEO Toolbox Online is a free SEO audit tool. Enter a URL and it crawls up to 10 pages of the site, runs 94 SEO checks plus 11 performance checks, and explains each result in plain language with the fix. It also has 62 single-purpose checkers and 18 generators for jobs such as testing a robots.txt file or writing Open Graph tags.

SEO Toolbox Online is an independent project, built and maintained by Prabath Thalangama, a software tech lead in Colombo with a background in Linux, cloud and Kubernetes infrastructure. That background shapes the tool: many of the checks are about what servers, DNS, TLS and HTML actually return, which is where technical SEO problems usually start.

Every check is based on published documentation, mainly Google Search Central, web.dev and the relevant RFCs, and each one links to its source. We do not score things Google has said it ignores, such as meta keywords, and we label signals that are useful but unproven, such as llms.txt, as informational. The full scoring model is on the methodology page.

Audit reports are private. Report and share pages carry noindex, are blocked in robots.txt and are never listed in our sitemap, so they cannot appear in search results. See the privacy policy for what we store and for how long.

Yes. Our robots.txt allows search engines and AI crawlers, and declares that preference with a Content-Signal line:

Content-Signal: search=yes, ai-input=yes, ai-train=yes

Private areas such as accounts, dashboards and reports are disallowed for every crawler.

The same team runs sysadmin.lk, which has server and network tools for system administrators. SEO Toolbox Online keeps the DNS, SSL, SPF, DMARC and other domain checks that affect search and email deliverability.

Use the contact page. Bug reports about a wrong result are especially welcome; please include the URL you checked.