These tools cover on-page SEO: the parts of a page you control directly, from the title and meta description to headings, content, technical setup and structured data. Each one tests a single URL, so they work well for checking a new page before or after launch, reviewing a key template, or finding out why a page is not performing as expected.
Which tool to use
- SEO Checker is the place to start. It fetches a page once and runs checks across four groups, AI readiness, search basics, technical health and content, then gives you a score from 0 to 100 and a list of issues to fix.
- Meta Tag Checker shows every meta tag on a page: the title and description with character counts and a snippet preview, meta robots, canonical, Open Graph and Twitter/X card tags, and hreflang.
- Schema Markup Validator checks JSON-LD structured data for syntax errors, validates types and properties against the schema.org vocabulary and checks Google's required properties for common types. It accepts a URL or pasted code.
A simple workflow
- Run the SEO Checker on the page to see the overall picture.
- If the title, description, canonical or social tags need work, open the Meta Tag Checker for the detail.
- If the page has no structured data, or its markup has problems, add or fix the JSON-LD and test it with the Schema Markup Validator.
- Publish your changes and run the SEO Checker again to confirm them.
For a complete, site-wide process, follow our SEO audit checklist. Our guides to meta tags for SEO and schema markup explain the background behind these checks. Site-level issues, such as crawler rules and sitemaps, are covered by tools like the Robots.txt Checker and the Sitemap Checker.
Frequently asked questions
Are these SEO tools free?
Yes. Every tool on NewBacklink is free to use.
Do these tools crawl my whole website?
No. Each tool checks one URL per run. Test your most important pages and templates one at a time, because a problem in a template repeats on every page built from it.
Which tool should I use first?
Start with the SEO Checker. It covers the widest range of checks and points you to the areas that need a closer look with the other tools.