100% free tool

Free SEO Checker

Audit any page's title, meta, headings, images, links and social tags - with a score and a fix list.

No sign-up required
Instant results
Only the address is sent

Enter a website URL

Enter a complete address, for example https://knowledgemarkg.com

Enter any public page and this runs the on-page checks an SEO audit starts with: title and meta description length, headings, image alt text, canonical and robots tags, HTTPS, mobile viewport, Open Graph tags, schema markup, word count and internal links. Each result says what is wrong and why it matters, and the score is simply how many checks passed. The page is fetched and parsed on our server, because a browser is not allowed to read another site's HTML.

Frequently asked questions

Common questions about the free seo checker.

Is this SEO checker really free?+

Yes - no sign-up, no email, no limits beyond a fair-use cap of about a dozen checks every few minutes so the fetcher is not abused.

What does the score mean?+

It is the share of checks that passed, with a half mark for a warning. It is a quick read on on-page health, not a ranking prediction - no tool can promise that.

Does it check my whole site?+

No, one page at a time. Run it on your home page and your most important landing pages; most on-page problems repeat across a template, so fixing one usually fixes many.

Why does it not show page speed?+

Speed needs real-user data to mean anything. Use PageSpeed Insights for that, and read our Core Web Vitals guide for what to do with the numbers.

Can I check a page that is behind a login?+

No. Only pages a search engine could fetch anonymously can be checked, which is also the only fair test of how Google sees them.

Worth reading

I Measured AI Traffic for a Month: What GA4's AI Assistant Channel Shows, and What It HidesTwenty-eight days of real numbers from one small site: ChatGPT now sends about as much traffic as Google organic, and it engages better. Plus the traffic GA4's new AI Assistant channel cannot see.4 min read How to Get Your Website Cited by ChatGPT and AI Overviews in 2026What the evidence says about being quoted in AI answers: how pages get retrieved and cited, what genuinely moves the needle, what makes no difference at all - including a file I added to this site anyway - and how to measure it.8 min read Core Web Vitals in 2026: How to Fix LCP, INP and CLS (Developer's Guide)Failing Core Web Vitals? The 2026 thresholds for LCP, INP and CLS, why most sites fail them, and the fixes a developer applies first - in the order that moves the numbers most.10 min read

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