SEO Checker
Score any website's SEO and get specific, ready-to-copy fixes.
Runs Google PageSpeed Insights (Lighthouse SEO, Performance, Core Web Vitals) and a static HTML audit fetched via a CORS proxy.
Frequently asked questions
How is the SEO score calculated?
It combines four weighted categories — On-Page, Technical, Content and Performance — into a single 0–100 score. Performance comes from Google PageSpeed Insights; the rest are computed from the page's HTML.
Is my page uploaded anywhere?
The page HTML is fetched through a CORS proxy so your browser can read a third-party site's markup, and the URL is sent to Google's public PageSpeed Insights API. Nothing is stored on our servers.
Why is the Performance score sometimes unavailable?
It comes from Google's free PageSpeed Insights API, which has a public rate limit and can occasionally time out or be unreachable for a given URL. The other three categories still score normally.
What are the Meta Tag and JSON-LD generators?
Quick fix-it tools built into the report: the Meta Tag Generator builds a complete <head> snippet (title, description, Open Graph, Twitter card), and the JSON-LD Generator builds valid structured data for common schema types — both pre-filled from your page where possible.