On-Page SEO Checker
Paste your full page HTML for a quick, well-rounded audit — title, description, headings, image alt text and link structure, all in one scan.
How to Use This Tool
Copy the full page HTML
View source on the page you want to audit and copy everything.
Paste it above
The complete HTML, not just a section — the tool scans the whole document.
Click "Analyze page"
Get an instant breakdown of every on-page element that matters.
Work through the results
Fix missing elements first, then review link and image counts.
About the On-Page SEO Checker
On-page SEO is everything about a page's own HTML and content that you have direct control over, as opposed to off-page factors like backlinks that depend on other sites. This tool bundles several of the most important on-page checks into a single scan, so instead of running five separate tools, you get one combined view.
It checks the presence of your title, meta description and canonical tag, counts your H1 and H2 headings, tallies how many images are missing alt text (an accessibility and image-SEO issue), and breaks down your links into internal/relative versus absolute URLs.
Use it as a pre-publish checklist — run any page through it before it goes live, and you'll catch the kind of small oversights (a forgotten alt attribute, a missing canonical) that are easy to miss but simple to fix once flagged.
Frequently Asked Questions
What's the difference between this and the Meta Tag Analyzer?
The Meta Tag Analyzer focuses specifically on five head-section tags in detail. This On-Page SEO Checker is broader — it covers meta tags plus headings, images and links in a single combined report, useful when you want one quick overview rather than several separate deep checks.
Why does image alt text matter for SEO?
Alt text describes an image to search engines and screen readers, since neither can "see" the image itself. It helps your images surface in image search results and makes your page more accessible to visually impaired visitors — both of which matter for a well-rounded SEO profile.
What counts as an "absolute" versus "internal/relative" link?
An absolute link includes the full URL with the protocol, like https://example.com/page. A relative link just references a path, like /page or #section, which the browser resolves relative to the current page's own domain.
Does this tool check page speed or Core Web Vitals?
No — this is a browser-based HTML structure check, and page speed metrics require actually loading and timing the live page's resources, which is outside what a paste-and-scan tool can measure. For that, use a dedicated tool like Google PageSpeed Insights.
How many images should have alt text?
Ideally all of them, except purely decorative images, which should have an empty alt="" attribute rather than none at all. Every image that conveys information should have a short, descriptive alt text.
Is there a limit to how large a page I can check?
No hard limit — since everything runs in your browser's own JavaScript engine, very large pages may just take a fraction of a second longer to parse, but there's no server-side size restriction.