How to Check the SEO of a Website Like an SEO Expert
By OnPageSEO.ai Team
Most beginners check the SEO of a website by glancing at a couple of keywords and calling it done. Experts do something different. They run through a specific list of technical, structural, and content factors, in a specific order, because skipping steps means missing the issue that is actually holding a site back. This guide walks through that same process, the one professionals use every time they check the SEO of a website for a client or their own project, and explains why each factor actually influences rankings instead of just listing checklist items.
Here is the short version. Checking SEO properly is less about tools and more about knowing what to look at first.
A couple of numbers worth knowing before we get into it.
- 80.4% of websites are missing image alt attributes, according to Bloggersideas' 2026 technical SEO statistics report.
- Nearly 7 in 10 sites (69.32%) have pages with zero internal links pointing to them, based on SE Ranking's analysis of more than 418,000 site audits.
What It Actually Means to Check the SEO of a Website
When a professional sets out to check the SEO of a website, they are not just skimming for obvious mistakes. They are building a layered picture, starting with whether the site can even be crawled and indexed, then moving into on page elements, then content quality, then authority signals like backlinks and brand mentions.
The order matters. A site with a perfect content strategy and broken indexing will still rank nowhere, because Google never gets past the crawl stage. That is why experts check the SEO of a website from the ground up instead of jumping straight to keyword density or content length, which are usually the last things worth touching.
How to Check the SEO of My Website Step by Step
"How do I check the SEO of my website" is a question we hear constantly from small business owners doing this for the first time. Here is the sequence professionals actually follow.
- Confirm the page is indexed and not blocked by robots.txt or a stray noindex tag
- Check for crawl errors, broken links, and redirect chains that waste crawl budget
- Review title tags and meta descriptions for length, relevance, and duplication
- Map the header structure (H1 through H6) to make sure it is logical and not skipped
- Audit internal links to confirm important pages are not orphaned
- Check image alt text and file sizes, since missing alt text remains one of the most common issues on the web
- Test page speed and Core Web Vitals on both mobile and desktop
- Confirm the page is mobile friendly and renders correctly without layout shifts
- Pull Search Console data to see which queries the page already ranks for
Running through this list is how you check the SEO of my website in a way that catches real problems instead of surface level ones. Most of it takes minutes per page once you know what you are looking for, which is exactly the part software can now speed up.
The Ranking Factors Experts Actually Weigh Most
A professional SEO audit focuses on impact, not just completeness. Some issues prevent search engines from understanding or indexing a page, while others improve visibility, usability, or click-through rates.
Experienced SEO professionals prioritize the factors that influence rankings and user experience the most before they spend time on smaller optimizations. This approach helps websites achieve better results faster and avoids wasting effort on low-priority fixes.
| SEO Ranking Factor | Why Experts Prioritize It | What to Check |
|---|---|---|
| Indexability | Pages cannot rank if search engines cannot crawl or index them. | Robots.txt, noindex tags, XML sitemap, crawl errors |
| Title Tags | Helps search engines understand the page topic and encourages clicks from search results. | Primary keyword placement, length, uniqueness |
| Heading Structure | Creates a clear content hierarchy for users and search engines. | Proper H1 usage, logical H2 and H3 organization |
| Content Quality | Satisfies search intent and demonstrates expertise, experience, authority, and trust. | Relevance, originality, completeness, readability |
| Internal Linking | Distributes authority across the site and helps search engines discover important pages. | Relevant anchor text, orphan pages, link depth |
| Meta Descriptions | Improves click-through rate by giving users a compelling reason to visit the page. | Clear summary, keyword relevance, recommended length |
| Page Speed | Faster pages improve user experience and reduce abandonment. | Load time, image optimization, script efficiency |
| Core Web Vitals | Measures real-world page performance and usability. | Largest Contentful Paint (LCP), Interaction to Next Paint (INP), Cumulative Layout Shift (CLS) |
| Mobile Friendliness | Most searches happen on mobile devices, so usability directly affects performance. | Responsive design, readable text, touch-friendly elements |
| Image Optimization | Supports page speed, accessibility, and image search visibility. | Alt text, compression, descriptive filenames |
No single ranking factor guarantees top positions in search results. Strong SEO comes from optimizing the elements that work together to improve crawlability, relevance, user experience, and engagement. Tools like OnPageSEO.ai help simplify this process by identifying high-impact issues first, so you can prioritize the fixes that are most likely to improve your website's performance.
AI Powered SEO Tools That Speed Up the Process
A decade ago, this entire process required a dozen browser tabs and a spreadsheet. AI powered SEO tools have compressed most of it into a single scan. That is exactly what we built with our free Chrome extension at onpageSEO.ai.
Instead of manually checking indexability, reading through header tags one by one, and hunting for missing alt text, our AI powered SEO tools run the full check directly on the page you are viewing. It maps your header structure so you can jump to any H1 through H6 without scrolling, audits every internal and external link with anchor text categorization, and flags images with missing alt text, with a built in one click WebP converter. The AI also drafts title tags and meta descriptions based on the page's actual content, so you are not staring at a blank field guessing what to write.
Most AI powered SEO tools on the market today focus on one piece of the process, like keyword research or backlink tracking. What we set out to build was different, a tool that covers the full on page checklist in one pass, right in the browser, so you are not switching between five different logins to finish a single audit. The free plan covers the essentials, and the Pro plan adds unlimited AI generation along with deeper Search Console recommendations for anyone managing more than one site.
AI Based SEO Tools vs Doing It by Hand
There is a real difference between AI based SEO tools and a fully manual audit, and it is not just speed. They are consistent, checking every page the same way every time, while a manual review tends to get shorter and less thorough by the fiftieth page of a large site. That consistency is why more solo marketers and small agencies now lean on software for the first pass and save their own time for the judgment calls.
That said, AI based SEO tools are not a replacement for judgment. Software can tell you a title tag is too long or an H1 is missing. It cannot always tell you whether the content actually satisfies what someone searching that term wants to find. That is still a human call, which is why we built onpageSEO.ai to handle the repetitive audit work and leave the strategy decisions to you. You can see the full breakdown of what is included on our pricing page.
Practical Checks You Can Run Today
Here is a short table you can use as a working reference the next time you check the SEO of a website.
| Factor | What to Look For | Why It Matters |
|---|---|---|
| Indexing | Page appears in Google, no noindex tag | Nothing ranks if it is not indexed |
| Headers | Logical H1 through H6 order | Tells Google the page structure |
| Internal links | No orphaned pages | Distributes authority across the site |
| Alt text | Every image has descriptive text | Affects accessibility and image search |
| Page speed | Passes Core Web Vitals | Acts as a ranking tiebreaker |
FAQs
Can ChatGPT do an SEO audit?
ChatGPT can review content, identify common on-page SEO issues, and suggest improvements. However, it cannot crawl your entire website or analyze live technical SEO unless you provide the data or use a dedicated SEO tool like OnPageSEO.ai.
How can I check my website SEO for free?
You can use free SEO tools to analyze title tags, headings, internal links, page speed, and other on-page elements. OnPageSEO.ai also offers AI-powered features and a Chrome extension that help you identify optimization opportunities without paying for an enterprise platform.
Can you see a website SEO?
Yes, you can evaluate a website's SEO by reviewing its content, metadata, page structure, internal links, mobile usability, and technical performance. An SEO audit tool makes this process faster by scanning these elements automatically and highlighting issues that need attention.
Free AI SEO tools to improve blog traffic
Free AI SEO tools can help optimize content, improve keyword placement, strengthen internal linking, and uncover on-page issues that may limit rankings. Using an AI-powered solution like OnPageSEO.ai helps you find quick wins and improve your blog's visibility in search results with less manual work.
Final Thoughts on How to Check the SEO of a Website
Learning to check the SEO of a website is less about memorizing ranking factors and more about following the right order, indexing first, then structure, then content, then authority. Skip a step and you risk fixing the wrong thing while the real issue sits untouched for another month.
You do not need an agency retainer to start. Run through the checklist in this guide on your own site today, and see how many of these issues are already sitting there unfixed. Most owners are surprised by how much is fixable in a single afternoon once they know exactly where to look.
If you want to check the SEO of a website in seconds instead of doing it by hand, sign up for onpageSEO.ai and install our free OnPageSEO.ai Chrome extension. It runs the full check in one click, right in your browser, so you can start fixing instead of just diagnosing.
