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Free tool · On-page SEO · Instant
On-Page SEO Checker: See Exactly What Search Engines Get from Any Page
Paste the address of any page and this free checker fetches it the way a search engine crawler does: robots.txt first, then the raw HTML your server sends. It reports the title, meta description, canonical, indexing directives, heading outline, structured data, language and mobile tags it finds, previews the search snippet, and lists every problem with the evidence and the fix. No email, no account.
- The server HTML a crawler receives, not what your browser shows after scripts run
- Indexing checks: robots.txt for Googlebot, meta robots, X-Robots-Tag, canonical
- Every finding shows its evidence, why it matters and how to fix it
- Free and instant, no email or sign-up
Run the check
Check Any Page’s SEO in Seconds
Why it matters
Most Ranking Problems Start with Something Nobody Can See on the Page
A page can look perfect in a browser and still send search engines the wrong signals. The title Google shows comes from a tag visitors never see. A single noindex directive, left behind by a staging site or switched on by a plugin, removes a page from search entirely. A theme and an SEO plugin can each add a canonical tag, and when the two disagree Google may ignore both. None of this is visible unless you read the HTML.
That HTML is what search engines and AI systems start from. Google’s Search Essentials begin with a page Google can crawl and index, and its documentation on title links and snippets explains how the title and description shape what searchers see. AI assistants that browse the web read the same markup. If the basics are wrong, better content and more links have to work against a broken foundation.
This checker reads one page the way a crawler does and tells you what it found, in plain language. It is the same first pass we run at the start of every technical SEO engagement, because there is no point rewriting a page that search engines are told to ignore.
What the Checker Reports
- Whether robots.txt lets Googlebot fetch the page
- HTTP status, redirects and response time
- Title, meta description and a search snippet preview
- Canonical tag, meta robots and X-Robots-Tag
- H1 and the full heading outline
- JSON-LD validity and schema types, microdata, hreflang
- Language, mobile viewport, Open Graph and image alt text
- Word count and internal and external links
The checks
What Each Check Looks for, and Why It Matters
Each check is a fact read from the page, not a prediction. Where a threshold is a rule of thumb rather than a rule, the result says so.
| Check | What we look for | Why it matters |
|---|---|---|
| Crawl access | Your robots.txt rules for Googlebot, applied to this exact URL | If robots.txt blocks the page, Google cannot read its content. If robots.txt returns a server error, Google treats the whole site as blocked (Google’s robots.txt guide) |
| Status and redirects | The HTTP status code and every redirect hop | Pages that keep returning errors drop out of search, and long redirect chains slow crawlers and visitors (Google on redirects) |
| Indexing directives | noindex or nofollow in the meta robots tag, a googlebot-specific tag, or the X-Robots-Tag header | A noindex directive keeps the page out of results, however good it is |
| Canonical | Whether there is exactly one canonical tag, and where it points | Several canonicals, or one pointing at another site, tell Google to index something other than this page (Google on canonical URLs) |
| Title | A single, non-empty title tag and its length | The title is the main clue to the page’s topic and usually becomes the search-result headline |
| Meta description | A single description and its length | Not a ranking factor, but often the snippet text that persuades someone to click |
| Headings | One H1 and an outline that does not skip levels | A clear heading structure helps people, screen readers and AI systems follow the page |
| Structured data | JSON-LD that parses, the schema types it declares, and microdata | Search engines ignore JSON-LD with syntax errors, so rich results and entity signals never arrive (Google’s structured data intro) |
| Mobile and language | A viewport meta tag and a lang attribute on the html element | Google indexes the mobile version of pages (mobile-first indexing), and the language attribute helps assistive technology and search engines |
| Sharing and media | Open Graph title and image, and images without alt attributes | Shared links look broken without Open Graph tags, and missing alt text hides images from screen readers and image search |
| Content in the HTML | Words and links present before any JavaScript runs | If key text only appears after scripts run, some crawlers and AI tools may see less than your visitors do (Google on JavaScript SEO) |
Results are labelled as an issue (a technical problem worth fixing) or a review item (something only you can judge, such as a page that is meant to be noindex, or a heading choice). Each comes with a severity, the evidence we found and the fix.
Reading your results
Fix in This Order: Can It Be Indexed, What Does It Say, How Does It Look
Not every finding is equally urgent. Severity reflects how directly an issue affects whether the page can be found.
High
Blocks Indexing or Causes Conflicts
An error status, a robots.txt block, a noindex you did not mean, more than one canonical, or no title at all. Any one of these can keep a page out of search no matter how good it is, so fix these first.
Medium
Weakens How the Page Is Understood
A missing meta description or H1, structured data that does not parse, a canonical pointing to another site, or no mobile viewport. The page can still rank, but search engines and AI systems get a less clear picture of it.
Low
Polish and Presentation
A title that may be cut off, skipped heading levels, missing Open Graph tags or alt text, no language attribute. Worth fixing on important pages, and usually quick to do in your CMS or SEO plugin.
How the check works
We Read the Page the Way a Crawler Does
First the checker requests your site’s robots.txt and evaluates it against the exact URL you entered, following the Robots Exclusion Protocol standard (RFC 9309): the most specific matching rule wins and Allow wins a tie. It does this twice. For Googlebot, to tell you whether Google may crawl the page. And for our own crawler, SEOMABot, to decide whether we may fetch it at all. If your robots.txt disallows the page for SEOMABot, or for all crawlers, we stop there and say so, because a well-behaved crawler would not fetch it either.
If the page is allowed, we request it once, follow up to three redirects on the same site, and record each hop. We read only HTML, cap the download at 2 MB and give up after 10 seconds, the same kind of limits real crawlers apply. The HTML is parsed as a crawler would parse it: no JavaScript is executed, so anything your site adds with scripts after loading is not seen. That is deliberate, because it shows what a crawler gets on its first pass.
The snippet preview shows your title and description at typical lengths. It is a preview, not a guarantee: Google rewrites titles and descriptions when it decides other text describes the page better. Structured data is checked for valid JSON and the schema types it declares. For eligibility for specific rich results, run the page through Google’s Rich Results Test or the Schema.org validator as well.
Fixing problems
How to Fix the Most Common Findings
Most on-page problems come from a theme, a plugin or a template, so one fix often corrects every page at once.
Remove Noindex Where It Does not Belong
Check your SEO plugin’s per-page setting and the site-wide “discourage search engines” option in your CMS. If the directive comes from the X-Robots-Tag header, it is set in your server or CDN configuration.
Keep Exactly One Canonical and One Title
Duplicate tags usually mean two plugins, or a plugin and a theme, are doing the same job. Turn off the feature in one of them rather than editing pages one by one.
Write a Specific Title and Description
Lead the title with what the page is about, and add your location or brand where it helps. Write a one or two sentence description of what the visitor gets. Every important page should have its own.
Fix Structured Data Syntax, Then Validate
A stray comma or quote breaks the whole JSON-LD block. Correct it in the plugin or template that outputs it, then re-run this check and test the page in the Rich Results Test.
Re-Run the Check After Every Change
Results are cached for ten minutes, then the checker fetches the page fresh. Confirm the fix is live in the HTML a crawler receives, not just in your editor.
Beyond one page
One Page Is a Sample. Your Site Is the Whole Picture
On-page problems rarely live on a single URL. A broken template repeats the same missing description or duplicate canonical across hundreds of pages, and sitewide problems such as orphaned pages, duplicate titles or sitemaps that list redirects only show up when you look at many pages together.
To see how your whole site performs, the free SEOMA Signal Score rates your domain for organic and AI search, combining real authority data with technical, content, entity and AI readiness checks. The Organic Search Readiness Checker leads with indexing and crawl health, and the AI Crawler Checker confirms that ChatGPT, Claude, Perplexity and Google can reach you at all.
When you want a person to go through it with you, our Organic and AI Search Optimization Audit covers every template, your logs and your content, and ranks the fixes by business impact.
About SEOMABot
SEOMABot: The Crawler Behind This Checker
If you found SEOMABot in your server logs, this is what it is and how it behaves.
- It identifies itself honestly, with a user agent containing “SEOMABot” and a link to this page
- It reads robots.txt before fetching anything and does not fetch pages that robots.txt disallows for SEOMABot or for all crawlers
- It requests a page only when someone asks to check it here, or when a verified site owner asks for their own site to be crawled
- It reads HTML only, one request at a time, with a pause between requests, and never submits forms or logs in
- It does not store page HTML, only the facts it reports, such as the title, status and tags
- It only fetches public websites on standard ports, never private networks or IP addresses
To block it, add a “User-agent: SEOMABot” group with “Disallow: /” to your robots.txt. Questions about a visit can go to our contact page.
Honest limits
What This Checker Cannot See
A useful tool is clear about where its evidence stops.
- Content added by JavaScript: the check reads server HTML, so single-page apps may look emptier here than in a browser
- Rankings, traffic and search demand: these come from Google Search Console and analytics, not from the page itself
- Page speed and Core Web Vitals: these depend on real visitors’ devices; the Signal Score reports them from Google’s Chrome UX Report where Google publishes data
- Rich result eligibility: we check that structured data parses and which types it declares, not every rule Google applies
- Pages behind a login, on private networks or on non-standard ports: the checker only fetches public pages
- Whether the content is good: no tool can judge if a page truly answers its visitor’s question
If the results raise questions, a technical SEO review looks at your templates, logs and Search Console data together.
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FAQ
Frequently Asked Questions
What is an on-page SEO checker?
An on-page SEO checker reads the HTML of a single web page and reports the elements search engines use to crawl, index and understand it: the title, meta description, canonical tag, indexing directives, headings, structured data and more. This one also checks your robots.txt and previews your search snippet.
Is this on-page SEO checker free?
Yes. It is free and instant, with no email or account. To keep it fair for everyone, each visitor can run a limited number of checks per hour, and results for the same page are cached for ten minutes.
Why does the checker see something different from my browser?
The checker reads the HTML your server sends, before any JavaScript runs, as a crawler does on its first pass. If your site builds content with JavaScript, your browser shows the finished page while the server HTML may be missing text, links or tags. Google can render JavaScript later, but other crawlers and many AI tools do not.
Can I check a competitor’s page?
Yes. The checker works on any public page whose robots.txt allows search crawlers. Comparing your page with the one that outranks you is a quick way to spot missing titles, descriptions, headings or structured data.
Does fixing these issues guarantee better rankings?
No. These checks make sure search engines can index the page and understand it clearly, which is the foundation. Rankings also depend on how well the content answers the search, and on how much the wider web trusts your site. The Signal Score measures that authority side.
Why does the checker say robots.txt blocks my page?
Your robots.txt contains a Disallow rule that matches this URL, either in a group for that crawler or in the general “User-agent: *” group it falls back to. If Googlebot is blocked, Google cannot crawl the page; if the rule blocks all crawlers, the checker does not fetch the page either. If the page should be in search, remove or narrow that rule, then check again. If robots.txt itself returns a server error, crawlers treat the whole site as blocked.
What is SEOMABot?
SEOMABot is the crawler that runs this checker. It identifies itself in its user agent, obeys robots.txt, reads HTML only and never stores page content. You can block it with a “User-agent: SEOMABot” group in robots.txt.
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