How to use free SEO tools to audit your website’s health
A healthy website is easy for search engines to crawl, useful for visitors, quick to load, and technically reliable on different devices. When any of these areas is weak, your pages may lose visibility even when the content is valuable. A website audit helps you find those weaknesses before they reduce traffic, leads, or online sales.
You do not need an expensive SEO platform to begin. Google Search Console, PageSpeed Insights, Lighthouse, Bing Webmaster Tools, and several free site crawlers provide enough data for a practical audit. These tools can help a Nigerian business owner review a VTU website, blog, online store, service platform, or personal brand site.
The important part is knowing what each tool measures and how to turn its report into an action. Rather than chasing every warning, focus on issues that affect crawling, indexing, user experience, and the pages that matter most to your business.
Understand the main parts of website health
Website health covers several connected areas. Technical SEO includes crawl errors, broken links, XML sitemaps, redirects, canonical tags, and mobile accessibility. Performance includes loading speed, server response time, image size, and the stability of page elements while a visitor interacts with the page.
Content quality is another major area. Each important page should target a clear search intent, use a descriptive title, provide a useful meta description, and answer the visitor’s needs better than competing pages. Duplicate, thin, outdated, or poorly structured content can make it difficult for search engines to understand your site.
Security and usability also matter. Your website should use HTTPS, avoid intrusive pop-ups, display correctly on mobile devices, and provide clear navigation. An SEO audit is therefore more than a keyword check; it is a complete review of how search engines and real users experience your website.
Start with Google Search Console
Google Search Console is one of the most valuable free SEO tools available. Add your domain, verify ownership, and submit your XML sitemap. The Sitemaps report shows whether Google can access the file, while the Pages report explains which URLs are indexed and which ones have problems.
Study the reasons for excluded pages carefully. Some exclusions are normal, such as admin pages or intentional noindex URLs. Others may reveal server errors, redirect issues, duplicate pages, soft 404s, or URLs discovered but not crawled. Open an affected URL with the URL Inspection tool to see whether Google can access and index it.
The Performance report shows search queries, impressions, clicks, click-through rate, and average position. Filter the data by page or country to understand how your site performs for Nigerian users. Pages with many impressions but few clicks may need stronger titles and descriptions, while pages ranking on the second page may benefit from improved content and internal links.
Check crawling and technical errors
A search engine crawler should be able to move through your website without meeting unnecessary barriers. Review your robots.txt file to ensure it does not accidentally block important folders or pages. Your sitemap should contain preferred, indexable URLs rather than redirected, deleted, or duplicate addresses.
Free versions of tools such as Screaming Frog SEO Spider can crawl smaller websites and identify broken links, missing title tags, duplicate headings, redirect chains, and response code errors. For larger websites, crawl a representative group of pages or use Google Search Console alongside a smaller site scan.
Pay special attention to 404 errors linked from important pages. A broken link can waste a visitor’s time and weaken the flow of authority through your website. Replace it with a relevant working URL, remove the link, or create a suitable redirect when the old page has a close replacement. Avoid redirecting every deleted page to the homepage because that rarely provides a useful experience.
Measure speed and mobile experience
Page speed affects user satisfaction and can influence search performance. Use PageSpeed Insights to test both mobile and desktop versions of key pages. The report includes Core Web Vitals such as Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift.
A slow result does not always mean that every part of the site needs rebuilding. The report normally identifies specific causes, including oversized images, render-blocking resources, unused JavaScript, slow hosting, or third-party scripts. Compress images, use modern formats such as WebP, remove unnecessary plugins, and enable browser caching where your hosting setup allows it.
Google Lighthouse, available through Chrome DevTools, provides another free performance and accessibility review. Test your homepage, a blog article, a product page, and an important conversion page. A fast homepage cannot hide a slow checkout page or a poorly designed service page.
Review on-page SEO and content quality
Free tools can reveal technical problems, but your own review is essential. Select pages that generate traffic or support your business goals and check whether each one has a clear primary topic. The main keyword should appear naturally in the title, introduction, relevant headings, URL, and supporting text without forced repetition.
Review title tags and meta descriptions for clarity and accuracy. A title should explain the page and attract the right searcher, while a description should communicate the benefit of clicking. Avoid using the same title across multiple pages. Add descriptive image alt text where images convey information, but do not fill alt attributes with keyword lists.
Internal linking helps visitors and crawlers discover related content. Link from broad guides to detailed tutorials, service pages, and helpful resources. For example, an article about starting a VTU business could link to guides on airtime-to-cash, bulk SMS, payment integration, and website security. This structure strengthens topical relevance and helps users take the next step.
| Audit area | Free tool | What to inspect | Useful action |
|---|---|---|---|
| Indexing | Google Search Console | Excluded URLs, coverage issues, sitemap status | Fix valid indexing errors and resubmit important URLs |
| Search visibility | Google Search Console | Queries, clicks, impressions, CTR, positions | Improve pages with high impressions and low clicks |
| Page speed | PageSpeed Insights | Core Web Vitals, image and script problems | Compress media, reduce scripts, improve hosting or caching |
| Technical crawl | Screaming Frog free version | Broken links, redirects, missing metadata | Repair important links and update page elements |
| Mobile usability | Lighthouse and Search Console | Layout, tap targets, readability, responsive design | Test templates on real mobile devices and simplify layouts |
| Structured data | Rich Results Test | Eligible schema and markup errors | Correct valid structured data on relevant pages |
| Security | Browser and hosting panel | HTTPS, certificate warnings, mixed content | Install a valid certificate and replace insecure resources |
| Backlinks | Ahrefs Webmaster Tools or Bing Webmaster Tools | Referring domains and suspicious patterns | Earn relevant links and monitor unusual activity |
Inspect structured data, links, and security
Structured data gives search engines extra information about a page. Depending on your content, you may use Article, FAQ, Product, Local Business, or Organization markup. Google’s Rich Results Test can show whether eligible markup is detected and whether required fields are missing. Structured data does not guarantee enhanced search results, but accurate implementation can improve how your pages are understood.
Backlink checks are useful for discovering websites that refer visitors and authority to your domain. Ahrefs Webmaster Tools provides limited free access for verified sites, while Bing Webmaster Tools includes reports about links and search performance. Look for relevant mentions rather than focusing only on the total number of backlinks. A link from a trusted technology, business, or Nigerian resource may be more valuable than many unrelated links.
Open your website in a browser and check the security indicators on important pages. HTTPS should work across the entire site, including login, payment, contact, and checkout pages. Mixed-content warnings, expired certificates, and insecure forms can damage trust. Keep your content management system, themes, plugins, and scripts updated, and maintain regular backups.
Follow a practical audit checklist
A repeatable process makes website maintenance easier. Begin with the pages that receive the most visits or generate leads, then expand the review to older and less visible sections. Record each issue in a spreadsheet with its URL, severity, recommended fix, and completion date.
Use this checklist during a monthly or quarterly review:
- Verify that the domain uses HTTPS and works consistently with the preferred www or non-www version.
- Check Google Search Console for new indexing, mobile, security, and manual action alerts.
- Test important pages with PageSpeed Insights on mobile and desktop.
- Find broken links, redirect chains, duplicate titles, and missing headings with a free crawl.
- Review high-impression pages for weak click-through rates, outdated information, and missing internal links.
Prioritise problems that affect many pages or block important business URLs. A homepage that cannot be indexed deserves immediate attention, while a minor heading issue on an old page can wait. After making changes, inspect the URL again in Search Console and monitor results rather than assuming the fix worked.
Turn audit data into steady improvements
An audit is useful only when it leads to action. Separate issues into urgent, important, and optional categories. Urgent tasks may include fixing a blocked sitemap, restoring a broken service page, resolving HTTPS errors, or repairing a major mobile layout problem. Important tasks may include improving slow templates, rewriting weak titles, and strengthening internal links.
Keep a simple record of changes and dates. Search performance can fluctuate for many reasons, so compare data over several weeks instead of judging a page immediately after an update. Watch organic clicks, impressions, indexed pages, Core Web Vitals, conversions, and engagement on priority URLs.
Free tools work best when used together. Search Console shows how Google sees your site in search, PageSpeed Insights measures user-facing performance, crawlers uncover structural problems, and your own content review supplies context that automated reports cannot provide. This combination is enough to build a strong SEO maintenance routine without a large monthly budget.
Set aside time this week to connect your website to Google Search Console, run a speed test, and inspect your most important pages. Fix the clearest technical problems first, improve one valuable page at a time, and use the next audit to measure progress. A consistent process can turn free SEO data into better visibility, stronger trust, and more opportunities for your online business.