SEOComet SEO Toolbar: On-Page SEO Checker

On-page SEO checks for any page: title, meta, headings, canonical, robots, schema, social tags, images, links and Core Web Vitals.

Check the on-page SEO of the page you're on in one click. No account needed. The toolbar reads the page and lists what to fix: - Title and meta description, with their lengths - Headings, word count, and published and modified dates - Canonical, meta robots, X-Robots-Tag, robots.txt and sitemaps - Hreflang - Structured data (JSON-LD and microdata), with missing required fields - Open Graph and X (Twitter) tags, with a share preview - Images without alt text, and image file sizes - Links: internal, external, nofollow, and broken links when you ask - HTTP status, the redirect chain and response headers - Core Web Vitals from the Chrome UX Report The icon badge shows how many issues each page has as you browse. Turn on the SEO bar (Alt+A, or Ctrl+Cmd+A on a Mac) for a strip across every page with its status code, title and description length, canonical and issue count. It's off until you turn it on, and it stays out of the way on web apps like Gmail, YouTube and Google search. You can also put the HTML the server sent next to the page after JavaScript ran, line by line. Nothing is sent to SEOComet. The toolbar talks to the site you're checking, to Google's Chrome UX Report API when you ask for Web Vitals, and to the image and link addresses on the page when you press a check button. Made by SEOComet. SEOComet can also watch a site's sitemap, robots.txt and ads.txt for changes, free.