On Page SEO Checker

What is on page seo checker?

On page SEO covers the parts of a page you control directly: the title, description, headings, images, links and markup. Fixing the basics removes easy problems before you work on harder ones.

This checker reads the HTML you paste, entirely in your browser, and scores 13 common checks. It tells you what passed, what needs a look and what to fix.

How to use the on page seo checker

1. Open your page, view the source and copy all of it.
2. Paste it into the box and press Check.
3. Fix the items marked Fix or Warning.

How the on page seo checker works

The tool parses the HTML like a browser. It checks the title and description length, the H1 count, H2 use, image alt text, canonical link, viewport, language, indexability, Open Graph tags, structured data, word count and link text. The score is the share of checks that passed.

Worked example

Common uses of the on page seo checker

• Auditing a new page before launch.
• Checking staging pages.
• Reviewing client sites.
• Training junior SEOs.
• Quick checks after a template change.

Tips and common mistakes

Use view source, not the inspector, to copy the HTML that search engines receive.

A perfect score does not mean you will rank. Content quality matters most.

Background: what to know before you rely on it

On page checks are a starting point for any audit. Titles and descriptions influence how a page appears in results, headings structure the content for readers and crawlers, alt text serves accessibility and image search, and canonical tags prevent duplicate content problems. None of these alone makes a page rank, but missing them creates avoidable gaps. Use this tool for quick checks, and then compare your page with the top results to see what depth and format searchers expect.

Private, free and fast

This tool runs entirely in your browser. What you type or choose is not uploaded to a server and is not saved after you close the page, which keeps it fast and private. It is free to use as often as you like. See more in all seo tools, or browse the full list of tools.

Related tools

Results are for information and education. For legal, financial, medical or security decisions, check with a qualified professional. Validate markup with search engine testing tools before publishing.