70 SEO checks, explained clearly.

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Title

A meta title is the clickable headline of your page in search results. See what length passes, how we test it and how to fix a failing check.

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Meta Description

Add, check and fix the meta description tag so search results can show a clear summary of your page.

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Headings

Learn what heading tags are, why one H1 per page is the safe rule, and how our free report finds and helps you fix heading errors.

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URL Canonicalization

Pick one preferred address for every page. See how our free report tests your canonical link and how to fix www, https and slash duplicates.

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Meta Canonical

A canonical tag tells search engines which address is the main version of a page. See the syntax, where it goes and what our free check reports.

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🌐

SEO Friendly URL

What makes a URL SEO friendly, with good and bad examples, plus exactly how our report tests your links and how to repair the ones it flags.

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🖼️

Image Alt Text

Learn how SEO Site Checker tests image alt text, what a warning means, and the quickest way to fix missing alt attributes on your pages.

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📱

Social Media Presence

Link your real profiles from every page and the report turns green. See what the check counts, what it misses and the exact HTML to paste.

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📲

Social Media Meta Tags

Open Graph and Twitter Card tags decide how your link looks when someone shares it. See what to add and how our report grades it.

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Structured Data

Learn what structured data markup is, how our free SEO report tests for it, and how to add JSON-LD so search engines understand your page.

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🎯

Keywords Usage

See which words your page repeats most and whether each one also appears in the title, meta description and headings. Free and instant.

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🚫

NoIndex Tag

A noindex tag asks search engines to keep a page out of their results. Learn how to spot one, remove it by mistake, or use it on purpose.

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Nofollow Attribute

What a nofollow link does, when to use rel nofollow, sponsored or ugc, and how our free report checks the external links on your page.

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📄

Charset Declaration

What the charset declaration does, why UTF-8 is the encoding to use, and how our free SEO report tests it on your page.

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⭐

Favicon

A favicon is the small icon that stands for your site in tabs, bookmarks and Google results. Learn the sizes, add one, and fix it if it is missing.

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📊

Google Analytics

Install the GA4 tag on every page, confirm data arrives and see exactly how our free report decides whether Google Analytics is detected.

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🤖

robots.txt

What a robots.txt file does, where crawlers look for it and how our free report grades it, with clear fixes for a missing or blocked file.

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📜

ads.txt

A plain guide to the ads.txt file: what each line means, where it must live, how our report scores it and how to fix a missing one.

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⛔

Disallow Directive

Learn what the Disallow directive blocks, what it does not, and how our free report checks it, with copy ready examples and fixes.

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🗺️

Sitemaps

A plain guide to sitemaps and the XML sitemap file, what our free report tests at /sitemap.xml, and how to fix a failed or warning result.

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⏩

Meta Refresh

How the meta refresh tag works, why it hurts SEO and accessibility, and what our free SEO report checks on your page.

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Meta Viewport

The viewport meta tag tells phones how wide to draw your page. See the exact tag to use, how we test it and how to fix a failed check.

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In-page Links

What internal links are, how our report tests them with live requests, and how to repair any link that returns an error.

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✉️

Plaintext Email

How to keep email addresses away from spam bots, what our plaintext email check reads on your page, and the fixes that turn the line green.

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⚠️

Unsafe Cross-Origin Links

What rel noopener noreferrer does, whether you still need it, and how our free audit flags insecure cross-origin resources on your page.

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🚧

Deprecated HTML Tags

Deprecated HTML tags such as font, center and marquee still render, but they belong in CSS. Here is how to spot them and swap them out.

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🗣️

Language

Declare your page language the right way with the lang attribute: valid codes, honest SEO facts and copy ready fixes for any platform.

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🔤

Most Common Keywords

The formula, a sensible percentage range and what our free report shows about the words your page repeats most.

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🧬

Long Tail Keywords Usage

Learn what long tail keywords are, how to find them and where to place them, plus what the Long Tail Keywords Usage card in our free report tests.

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✅

Google Site Verification

What the google-site-verification tag and TXT record do, how to add them, and how to fix a Not Found result in your free SEO report.

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📏

Content Length Test

What content length means for SEO, how our report tests it, and how to turn a thin page into one that fully answers the search.

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🔒

SSL Checker and HTTPS Test

Check any site's SSL certificate in the browser, with OpenSSL or with our free report, then read the result and fix what fails.

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HTTPS encryption

What HTTPS encryption is, what it hides, how our free report tests your certificate and how to turn it on.

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🛡️

HSTS

A plain guide to the Strict-Transport-Security header: what our HSTS check tests, why it fails, and a safe rollout from a short max-age to preload.

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⚠️

Mixed Content (HTTP over HTTPS)

Mixed content means a secure HTTPS page still loads images, scripts or styles over plain HTTP. Here is how to spot it, fix it and keep it out.

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🖥️

Server Signature

See what your Server header tells attackers, how our free report tests it, and the Apache, nginx, IIS and LiteSpeed settings that hide it.

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✉️

SPF Records

Your SEO report flagged a missing SPF record. Learn what it means, how our check works and the one DNS line that turns it green.

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Safe Browsing Test

Find out whether Google flags your site as unsafe, what our report's Safe Browsing test really checks, and how to clear a warning.

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🚀

HTTP2 Test

HTTP/2 lets browsers load many files over one connection. Learn how to test it, how our report scores it and how to enable it on Nginx or Apache.

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