SEO Checker — El Joseo
The Chrome extension that analyzes any page's SEO in seconds: meta tags, headings, Open Graph, structured data, tech stack, and more. Free.
Tired of opening five different tools every time you want to check a page’s SEO? With SEO Checker - El Joseo you do it all from a single Chrome extension, without leaving the tab you’re on — completely free.
Don’t want to install anything? The same checks are available on the web with my free SEO audit: paste the URL and that’s it, no extension required.
WHAT DOES THE EXTENSION CHECK?
I click one button and within seconds I have everything Google (and any SEO) needs to know about that page.
Meta tags and markup
Title, meta description, URL, canonical, robots directives, author, and language — each with a character counter that tells you if you’re too short, too long, or right on the mark.
Heading structure
A full map of your headings, H1 through H6, in the exact order they appear in the document. Instantly flags a missing H1 or more than one on the page (a more common mistake than you’d think).
Social preview
How your page will look when someone shares it on Facebook or X/Twitter, with Open Graph and Twitter Card validation. No more finding out about a broken thumbnail after you’ve already published.
Technical and content audit
- Word count for the content
- Internal vs. external links, separated out
- Images missing alt text
- Structured data (Schema / JSON-LD) detection and validation
- Hreflang tag analysis
- Tech stack detection: CMS, frameworks, analytics tools, and payment gateways
Extra tools
- Keyword combination generator, with custom separators and case transforms
- One-click shortcuts to PageSpeed Insights, WebPageTest, Google Rich Results Test, Wayback Machine, and Common Crawl
- Automatic robots.txt and sitemap discovery for the site you’re viewing
WHY USE IT?
- Everything in one place: no more jumping between ten different tabs.
- Free, no fine print: I don’t sell your data to third parties or use it for anything shady.
- Built by an SEO, for SEOs: every metric it measures is one I actually check daily in my own work.
Questions or suggestions?
If you have any doubts, questions, or ideas for a future version, email me directly at jose@eljoseoweb.com or from the contact page — I read every email.
Privacy Policy
Access the privacy policy here.