Free SEO Tools Built on
How Google Actually Works

What Are Free SEO Tools?

Free SEO tools are web-based utilities that help you audit, analyse and improve your website's visibility in search engines without paying a subscription fee. They cover everything from checking whether your H1 tags are structured correctly, to validating your XML sitemap, to scanning your page for broken links or missing alt text.

Why Free Tools Are Enough for Most Sites

Paid SEO platforms bundle many tools together, but for most independent site owners, developers and small teams, individual free SEO tools cover 90% of daily SEO work. You rarely need a single expensive dashboard when you can run a canonical check, a readability audit and a broken-link scan separately in under five minutes using free tools with no login required.

What Behind the Search Free SEO Tools Cover

The toolkit covers four categories. On-page SEO tools check headings, meta tags, keyword density, image alt text and internal linking. Technical SEO tools cover sitemaps, robots.txt, broken links, HTTPS, page speed, Core Web Vitals and IP canonicalization. Content tools handle readability, grammar, keyword cannibalization and stop words. AI tools help you build llms.txt files and optimise for answer engines like Perplexity and ChatGPT.

How Free On-Page SEO Tools Help You Rank Higher

On-page SEO is the most direct lever you control. Search engines read your HTML to understand what your page is about, who it is for and how trustworthy the content is. On-page SEO tools let you see your page exactly as a crawler sees it.

Headings, Title Tags and Meta Descriptions

The free HTML Headings Checker audits your H1 to H6 structure for hierarchy errors, missing H1 tags, duplicate headings and AEO signals like question-format headings. The free Meta Title and Description Checker shows you pixel-accurate SERP previews so you know exactly how your listing looks in Google before publishing.

Images and Internal Links

Google uses alt attributes to understand image content. The free Broken Image Checker finds every broken image, empty alt tag and oversized file on your page in one scan. The free Internal Link Checker maps your internal linking structure so you can identify isolated pages that receive no link equity from the rest of your site.

Schema and Structured Data

Structured data tells Google and AI tools the type of content on your page. The free Schema Markup Generator builds valid JSON-LD for Article, FAQ, HowTo, Product and LocalBusiness types. No coding required. Just fill in the fields and copy the output into your page head.

Free Technical SEO Tools: What to Fix First

Technical SEO problems are invisible to users but highly visible to Google's crawlers. A single robots.txt mistake can block an entire section of your site from being indexed. A missing HTTPS redirect leaks PageRank. These free technical SEO tools help you find and fix those silent issues fast.

Crawlability and Indexing

Start with the free XML Sitemap Validator to check your sitemap for errors, noindex conflicts and missing URLs. Then use the free Robots.txt Checker to confirm you are not accidentally blocking Googlebot from crawling your best pages. The free Noindex Checker reveals any meta robots or X-Robots-Tag directives that could be preventing pages from appearing in search results.

Redirects and HTTPS

The free IP Canonicalization Test checks whether typing your server's raw IP address into a browser redirects correctly to your domain. This is a basic technical SEO requirement that many sites miss. The free HTTP to HTTPS Checker verifies that your SSL certificate is installed correctly and all HTTP requests redirect to the HTTPS version.

Page Speed and Core Web Vitals

Google uses Core Web Vitals as a ranking signal. The free Core Web Vitals Tester measures LCP, CLS and INP. The free DOM Size Checker counts your total DOM nodes, since pages with more than 1,500 DOM elements regularly fail Interaction to Next Paint scores. Use these tools together to trace slow pages back to their root cause.

AI SEO Tools and Generative Engine Optimisation

Search is changing. Google AI Overviews now appear above traditional results for millions of queries. Perplexity, ChatGPT Search and Microsoft Copilot handle queries that used to go exclusively to blue-link search. Optimising for AI-generated answers is now as important as optimising for traditional rankings.

What Is GEO (Generative Engine Optimisation)?

Generative Engine Optimisation (GEO) is the practice of structuring your content so that AI language model tools are more likely to cite your site in their generated answers. The key signals are: clear, direct answers to questions; properly structured headings that match question formats; schema markup that tells AI tools the type of content; and an llms.txt file that explains to AI crawlers what your site covers and which pages matter most.

The LLMs.txt File

The free LLMs.txt Generator builds a properly formatted llms.txt file for your website. Perplexity and Anthropic (Claude) both read this file. You add your site description, key pages, documentation links and any pages AI tools should not use. Then upload the file to your website root at yourdomain.com/llms.txt. The entire process takes under five minutes with no login required.

AEO and Question Heading Structure

The free AEO Audit Tool checks your page for Answer Engine Optimisation signals. It looks at whether your H2 and H3 headings are phrased as questions, whether the paragraphs beneath them give direct answers, whether you have FAQ schema, and whether your content is structured for featured snippet extraction. Use it alongside the free Headings Checker for a complete AEO and GEO audit with no login needed.