On-Page SEO Checker
Free, no signup. A concise five-item on-page memo first, with the full raw-HTML detector output available in Advanced.
General preserves the base report. A named profile adds its required-signal checks; unavailable schema guidance and pack weights stay visibly not evaluated.
Checks run from our server; we fetch the URL you enter and don't keep the results. Anonymous run-level outcome counters may be used for aggregate research; URLs, domains, IPs, and identifiers are never included, and no statistic is released below 100 runs.
Sample report
Illustrative example — deterministic raw-HTML findings, not a live site claim
For a 200 page with no title, one H1, a self-canonical, a missing meta description, and an image without alt text, the report would summarize:
2 errors · 1 warning · supporting passes and not-evaluated checks
How to use it
- Enter a public, crawlable page URL and choose Run report.
- Start on Simple: top 5 for the highest-priority memo.
- Open Advanced: all checks to see every supported detector, including passes and not-evaluated states.
- Verify important fixes in the rendered page and Search Console where appropriate.
Current target
Recent checks appear below. Use the star beside any saved site, page, or list to favorite it.
Create a named list
Target filled from your local choices.
Site passport Local context for this saved site
Local data
Saved targets, named lists, and recent check summaries remain only in this browser.
Changed page? Compare a selected Wayback capture with the current page.
Rate this tool
What the results mean
- Errors (red) are clear implementation defects or strong blockers supported by the response.
- Warnings (orange) are likely issues that need context before changing the page.
- Needs review (yellow) marks evidence that cannot support a pass or error verdict yet.
- Information (blue) records useful evidence without calling it a defect.
- Pass means that specific observable rule passed, not that the whole page is optimized.
- Not evaluated means no verdict was possible and never counts as a pass.
How it works
The server retrieves the public response because browser cross-origin rules prevent direct inspection. The page context normalizes the final URL, status, headers, and raw HTML, then a deterministic detector registry runs supported technical and on-page checks. The Simple memo prioritizes the same results; it does not use a separate opaque score.
Features
- Five-item prioritized memo plus complete detector output.
- Checks across metadata, headings, canonicals, directives, links, images, and supported markup.
- Hreflang cluster validation follows up to 500 declared URLs with at most six concurrent fetches.
- Evidence-based pass, warning, error, information, and not-evaluated states.
- Escaped output and no fabricated verdicts when evidence is unavailable.
Limitations
This checker does not render JavaScript, run Lighthouse, measure Core Web Vitals, assess accessibility, score writing quality, inspect backlinks, or predict rankings. Hreflang detail shown on the page and in coverage samples is bounded even when validation reaches the 500-URL ceiling. A fetch can also differ from Googlebot because it originates from this site's server infrastructure. Confirm rendered and index-level behavior with purpose-built tools.
Frequently asked questions
What does an on-page SEO checker analyze?
This checker analyzes signals available in the server-returned HTML and response metadata, including titles, descriptions, headings, canonicals, robots directives, links, images, and supported structured-data patterns.
Is a passing report a guarantee that the page will rank?
No. The report identifies observable implementation issues. Rankings also depend on relevance, content quality, competition, authority, internal linkingAn internal link is a hyperlink from one page on a website to another page on the same website. Internal links help search engines discover your pages and pass ranking signals (PageRank and anchor-text context) between them., and signals this raw-HTML tool cannot measure.
Why does the report say not evaluated?
Not evaluated means the checker lacks the evidence or rendering capabilityTurning HTML, CSS, and JavaScript into the final visual page and DOM. needed for a responsible verdict. It is different from a pass and keeps unavailable checks from inflating the result.
Does the checker render JavaScript?
No. It analyzes the raw HTML response. Use a rendered-page tool when a JavaScript application changes metadata, headings, content, or links after load.
Which findings should I fix first?
Start with errors that can prevent crawlingCrawling is how search engines use automated bots (like Googlebot and Bingbot) to discover URLs and download pages. A page has to be crawlable to be indexed, but crawling on its own isn't a ranking factor., indexingStoring a crawled page in the search index so it can appear in results. Crawled is not the same as indexed — Google selects what to keep, and indexing isn't guaranteed., or a useful search result, then address warnings that affect page meaning. The Simple tab prioritizes five findings using the same detector results shown in Advanced.
Feature requests for On Page Seo Checker
Upvote what you want most. New ideas can be submitted from the floating Feedback menu; requests appear here once approved, and the most-wanted rise to the top.
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Common issues & how to fix them
- Warning Primary H1 is missing Fix: Add one descriptive H1 that clearly states the page’s primary topic.
- Warning Heading hierarchy skips levels Fix: Restructure headings into a sequential hierarchy that reflects section nesting.
- Information Low visible text volume Fix: Review whether the observed text is complete for the page’s purpose. Add useful information only when something material is missing; do not pad the word count.
- Warning Title is near-duplicate of another signal Fix: Differentiate the title from competing page signals so it uniquely identifies this page’s intent.
- Warning Images lack alt attributes Fix: Add concise alt text to meaningful images and empty alt attributes to decorative images.
- Warning Links are non-navigational Fix: Give each navigational link a valid href and descriptive accessible text, or use a button for non-navigation actions.
- Error Title element is missing Fix: Add one non-empty, page-specific title element in the initial HTML.
- Warning Meta description is missing Fix: Add a concise page-specific meta description in the initial HTML.
- Error Noindex directive is present Fix: Remove noindex from pages meant to be indexed, or keep it only when exclusion is intentional.
- Warning Canonical is missing Fix: Add one absolute rel=canonical URL for the preferred indexable version.
- Information Structured data is absent Fix: Add supported structured data only when it accurately describes visible page content.
- Error Title elements contain conflicting values Fix: Keep one non-empty title element in the document head and remove every competing title value.
- Warning Robots directive is outside the HTML head Fix: Move the intended robots meta directive into the document head and remove ineffective body declarations.
- Warning Robots directive combination is ineffective Fix: Add the prerequisite robots directive or remove the ineffective token, then verify the effective Googlebot policy.
- Warning Canonical element is outside the HTML head Fix: Move the intended canonical link into the document head and remove body-level canonical declarations.
- Warning Noindex and canonical are combined Fix: Confirm whether exclusion or consolidation is intended, then remove the signal that conflicts with that outcome.
- Warning Robots.txt prevents Googlebot from seeing noindex Fix: Allow Googlebot to crawl the page while noindex removal is required, then verify that the directive can be processed.