Free SEO Checker

How the SEO Checker Works

Our on-page SEO audit fetches your page and analyzes 15+ factors that affect search engine visibility.

Frequently Asked Questions

Complete Guide to Website SEO Auditing

Understanding what your SEO checker is actually measuring — and what to do about it.

An SEO audit is a systematic examination of the factors that affect how well your website ranks in search engines. Unlike a one-off check, a proper audit covers three distinct layers: technical SEO (how well search engines can crawl and index your site), on-page SEO (how well individual pages are optimized for target keywords), and off-page SEO (the external signals — primarily backlinks — that indicate your site's authority). Most tools, including this checker, focus primarily on technical and on-page factors because these are directly measurable from the publicly visible HTML of any page.

The 7 Most Critical On-Page SEO Factors

Not all SEO signals carry equal weight. After auditing thousands of pages, these seven factors consistently have the greatest impact on rankings:

1. Title tag optimization — Your title tag is the single most important on-page element. It should be 50–60 characters, include your primary keyword near the front, and be unique across every page on your site. Duplicate or missing titles are a guaranteed ranking suppressor.
2. Meta description — While not a direct ranking factor, a well-written meta description (150–160 characters) dramatically improves click-through rate from search results. Google will sometimes auto-generate snippets, but crafting your own gives you control over the first impression.
3. H1 and H2 heading structure — Every page should have exactly one H1 tag containing the primary topic. H2 tags should organize sections logically. Search engines use heading hierarchy to understand content structure, and screen readers rely on it for accessibility.
4. Canonical tags — If your site has multiple URLs that serve the same or very similar content (e.g., HTTP vs. HTTPS, with and without trailing slashes, paginated versions), canonical tags tell Google which version to index. Missing canonicals cause duplicate content issues that split your ranking power.
5. Page speed and Core Web Vitals — Since Google's 2021 Page Experience update, Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Interaction to Next Paint (INP) are direct ranking signals. Pages that load in under 2.5 seconds consistently outrank slower competitors in competitive niches.
6. Mobile-friendliness — Google uses mobile-first indexing for all new sites, meaning it primarily crawls the mobile version of your pages. A viewport meta tag is the minimum requirement; a fully responsive layout is the standard.
7. Structured data (Schema markup) — JSON-LD schema markup enables rich results in Google Search: star ratings, FAQ dropdowns, recipe cards, product prices. These enhanced listings dramatically increase click-through rates — often by 20–30% — without changing your actual ranking position.

How to Interpret SEO Checker Results

Common SEO Mistakes That Kill Rankings

The most common SEO problems we see in audits fall into predictable patterns. Missing meta descriptions leave Google to generate arbitrary snippets, often pulling irrelevant text that reduces click-through rates. Duplicate content — the same text appearing on multiple URLs — causes Google to choose which version to rank, often picking the wrong one. Thin pages with fewer than 300 words rarely rank for competitive terms because they lack the depth to demonstrate topical expertise.

Broken internal links waste crawl budget and create dead ends for users. Every 404 on an internal link is a lost opportunity to pass link equity to a relevant page. Missing canonical tags are especially problematic for e-commerce sites with faceted navigation, where filtering by color or size creates hundreds of near-duplicate URLs that confuse search engines about the authoritative version of a product page.

How Often Should You Run an SEO Audit?

Audit frequency should scale with the pace of change on your site. Growing sites publishing multiple pieces of content per week should run automated checks monthly — new pages frequently introduce new issues. Established sites with stable content can audit quarterly, with spot-checks any time a major update is deployed. Any time you migrate platforms, change URL structures, or redesign your site, run a full audit immediately before and after the change. SEO issues introduced during migrations can take months to reverse if caught late.

Technical SEO and Core Web Vitals: The Connection

Google's Core Web Vitals are the clearest example of technical SEO directly impacting rankings. LCP measures how long it takes for the largest visible element on the page to load — typically a hero image or above-the-fold heading. The target is under 2.5 seconds. CLS measures visual stability: how much page elements shift around as the page loads. A CLS score above 0.1 is visually jarring and penalized. INP measures responsiveness to user interactions — clicking buttons, filling forms. Each of these metrics is measurable by our speed checker and directly correlated with both rankings and conversion rates. A 1-second improvement in LCP has been shown to increase conversions by 7% in e-commerce contexts.

Frequently Asked Questions About SEO Auditing