On-Page SEO Audit

What is the On-Page SEO Audit?

The On-Page SEO Audit is a free tool that reads the HTML of one page and lists its on-page issues, ranked by impact. It checks the title, meta description, headings, image alt text, canonical tag, mobile viewport, HTTPS, structured data and HTML weight, and gives every finding a recommendation. A target keyword adds checks on the title and description.

How to use the On-Page SEO Audit

1. Paste the full URL of the page you want to audit. The path matters: the audit reads that exact page, not the whole site.
2. Add a target keyword if you have one. It adds two checks: whether the keyword appears in the title and in the meta description.
3. Press Audit page. The tool fetches the HTML the server sends, the version a crawler receives first.
4. Read the counts of critical issues, warnings and good elements at the top.
5. Work through the issues. They are grouped by section with the highest impact first, and each one has a recommendation and, where there is one, the element that caused it.

What does an on-page SEO audit check?

An on-page SEO audit checks the parts of one page you control in its HTML: the title, the meta description, the headings, image alt text and the tags in the head that tell search engines how to treat the page. This audit reads the served HTML, which is the version a crawler receives first.

The result is a list of fixes for that one page. Each finding names the problem, its impact and what to change, so you can work through it top to bottom and audit the page again when you are done.

How are the audit's issues ranked?

By impact: high, then medium, then low. High impact goes to problems that stop a page doing its job: no title, no meta description, no H1, no mobile viewport, a URL not on HTTPS, a keyword missing from the title, or more than half the images without alt text. Those count as critical issues.

Medium impact covers problems that shape how well a working page does: title or description length, more than one H1, no H2 sections, some images without alt text, no canonical tag, no structured data and more than 500 KB of HTML. Where a finding comes from a specific element, such as the competing H1s or the first three images missing alt text, the audit shows it.

On-page SEO audit vs on-page SEO checker: which should I use?

Use the audit when you want a to-do list, and the On-Page SEO Checker when you want a score to track. The audit sorts every failure by impact, each with a recommendation.

The checker grades a page across ten groups, including Open Graph tags, links, hreflang and code quality, and returns a score out of 100. The two scores are not comparable, so compare each tool against its own earlier results.