What Gets Checked
Meta Tag Checker evaluates five key areas of your page's on-page SEO. Here's what we look at in each category.
Essential Tags
The foundation of on-page SEO. We check your title tag (aiming for 30-60 characters), meta description (120-160 characters is the sweet spot), canonical URL, viewport meta tag for mobile responsiveness, robots directives, and character encoding. These are the tags that every page needs to get right.
Open Graph Tags
Open Graph tags control how your page appears when shared on Facebook, LinkedIn, Slack, and other social platforms. We check for the four essential OG tags: og:title, og:description, og:image, and og:url. Without these, social platforms will guess what to display — and they often get it wrong.
Twitter Cards
Twitter (now X) uses its own set of meta tags to generate rich previews when links are shared. We verify your twitter:card type, twitter:title, twitter:description, and twitter:image are present and properly formatted so your content looks professional when shared.
Heading Structure
Search engines use headings to understand the structure and hierarchy of your content. We check that your page has exactly one H1 tag (your primary heading) and that H2 tags are used to organise supporting sections. Multiple H1 tags or missing headings can confuse search engines about your page's topic.
Image Accessibility
We audit every image on the page for alt text — the descriptive text that tells search engines (and screen readers) what an image shows. Missing alt text is a common SEO issue and an accessibility problem. We report exactly how many images are missing this important attribute.
Who Meta Tag Checker is for
The tool is built for anyone who publishes web pages and wants them to perform in search and on social — without installing software or learning a full site crawler. SEO specialists use it as a fast pre-flight check before a page goes live. Web developers run it to confirm a template outputs the right tags across a whole site — fix the template once and every page built from it improves. Content and marketing teams use it to make sure a new article has a compelling title and description before it's published or shared. And agencies use it to audit client pages quickly during a review, then hand over a clear, plain-English list of exactly what to fix.
What the tool checks — and what it deliberately doesn't
Meta Tag Checker is a focused, single-page on-page SEO audit. It reads the live HTML of the exact URL you give it and reports on the tags and structure within that page. That focus is intentional: you get a complete, accurate read of one page in seconds rather than a vague site-wide score that's hard to act on.
It does not crawl your entire site, measure backlinks or domain authority, or score page speed and Core Web Vitals — those are separate disciplines with their own dedicated tools. It also reads the HTML as first delivered, the same way a search engine crawler first sees your page. If a tag is injected by client-side JavaScript after the page loads, a raw fetch won't see it — which is genuinely useful to know, because it's a strong hint that search engines and social platforms may not pick it up reliably either.
How we keep the results accurate
We parse the raw HTML with an encoding-safe approach, follow redirects through to the final destination, and grade each element against the length ranges and best practices Google currently documents. The thresholds — 30–60 characters for a title, 120–160 for a description, exactly one H1 per page — reflect how results are actually displayed and indexed today, not outdated rules of thumb. Every check rolls up into a weighted A–F grade so the elements that move the needle most carry the most weight, and the report always tells you the specific fix, not just the score.