How to run an on-page SEO check
- Enter a complete public webpage URL.
- Run the check.
- Review each category and its evidence.
- Open a focused checker for any issue that needs more detail.
- Verify important findings in the deployed page, browser and external tools.
What does the SEO Checker review?
SEO Checker retrieves the page response and checks title and description tags, canonical and robots directives, H1–H6 headings, Open Graph metadata, JSON-LD syntax, hreflang markup, links, images, performance hints, response headers, robots.txt and sitemap discovery.
It is a page-level review of returned HTML and bounded response checks. It does not replace a rendered crawl, Search Console, analytics, field performance data or manual content review.
Response and source checks
The report should identify the response status, final URL and whether useful HTML was returned. Unexpected redirects, blocked requests and non-HTML responses should be explained clearly.
Use the HTTP Header Checker for detailed response fields. Use View Source to inspect the returned HTML directly.
Title and meta description
A useful report shows the extracted title and description without treating fixed character counts as universal rules.
Review whether each element:
- Represents the page accurately
- Is specific to the page
- Matches the main user task
- Avoids boilerplate and unsupported claims
- Works together with the visible H1 and content
Use the Meta Description Checker for a focused review and the SERP Snippet Preview to test wording in an approximate result layout.
Heading structure
The checker summarizes the H1–H6 outline and flags empty headings and skipped heading levels. Multiple H1 elements and skipped levels need context; they are not automatic ranking penalties.
Use the Heading Checker for a dedicated outline report.
Canonical and indexability signals
A page-level review can inspect signals found in the returned response, including:
- HTTP status
- Canonical element
- Meta robots directives
- X-Robots-Tag when headers are available
- Redirect destination
These signals can conflict, and they do not prove that a search engine indexed the page. Verify important indexability findings with deployed-page inspection and search-engine data.
Use the Robots.txt Checker for crawler-access rules and the XML Sitemap Checker for sitemap validation.
Links and images
The report counts links and images in the returned HTML, identifies empty or unusable link targets, and checks image alt attributes and declared dimensions. It does not crawl the rest of the website or include links added after JavaScript execution.
Use the HTML Extractor when you need structured element lists.
Social metadata
Open Graph and related social tags can influence how a page is represented when shared on supported platforms. They are separate from the standard search snippet system.
Use the Open Graph Checker for a focused social metadata review.
Structured-data limitations
The checker parses JSON-LD blocks found in the returned HTML and reports syntax errors plus a limited set of required-field checks. It does not establish rich-result eligibility or guarantee search-result display. Use dedicated validators and deployed-page testing for those questions.
Content quality cannot be reduced to a score
Automated checks can identify observable elements, but they cannot fully judge whether a page answers the user’s question, provides original value, demonstrates expertise or satisfies search intent.
Avoid a single score that hides evidence. Show findings by category, explain limitations and help the user choose the next verification step.
Recommended next checks
- Analyze H1–H6 headings
- Check the page’s meta description
- Inspect HTTP response headers
- Test robots.txt rules
- Validate an XML sitemap
- Check Open Graph metadata
- Inspect the original returned source
Frequently asked questions
Is this a complete website SEO audit?
No. It is a page-level check of the signals the tool can retrieve. A complete audit requires crawling, rendered inspection, performance data, indexation data and business context.
Can an SEO score predict rankings?
No. A score cannot predict rankings or guarantee traffic. Findings should be evaluated by impact, evidence and the page’s purpose.
Can the checker confirm whether a page is indexed?
No. It can inspect relevant signals, but indexation requires search-engine data and live verification.
Does passing every automated check mean the content is good?
No. Automated checks cannot fully evaluate usefulness, originality, accuracy or intent satisfaction.
Can the checker see JavaScript-generated elements?
Only if the implementation renders the page before analysis. The report must state whether it uses returned HTML or a rendered DOM.