The SEO Content Checker runs the text you paste through a checklist of on-page best practices: content length, subheadings, paragraph and sentence length, readability and, if you enter a target keyword, whether it appears in the opening, in a heading and at a sensible density. Each item passes or fails with a tip, and the results add up to a score out of 100.
Made for marketers and seo. Typical uses:
The score is a content checklist, not a prediction of rankings. Google publishes no such score, and rankings also depend on links, page speed, search intent and authority. It reads only the text you paste, not a live page.
Accuracy: Results show what the tool can measure at the moment you run it and can differ from what search engines see. Use them as guidance.
Explore more in SEO Tools, read the guides and articles, or see how we test our tools.
Check website loading speed and get performance scores.
Best for catching render-blocking scripts and non-lazy images before a page goes live
Check heading tag structure on any webpage.
Best for confirming a page has exactly one H1 before a content audit
Check image alt text for SEO compliance and accessibility.
Best for auditing a blog post's images before publishing to catch missing alt text
Analyze text readability with Flesch Reading Ease score. Know your audience.
Best for checking a blog post's readability before publishing to make sure it matches your audience's reading level
Check canonical tags on any webpage to prevent duplicate content issues.
Best for verifying a migrated site's pages canonicalize to the correct new URLs