Search Engine Optimization — SEO — sounds technical and overwhelming when you’re just starting out. Between sitemaps, robots.txt files, meta tags, and heading structures, the terminology alone can make you feel like you need a computer science degree.
The truth is simpler: SEO is about making it easy for Google to understand what your pages are about and trust that they’re valuable. And you don’t need expensive tools or a technical background to do it.
This guide covers the fundamental SEO checks you can run with free online tools — starting right now.
Meta Tags: Your Page’s First Impression
When your page appears in Google search results, users see two things: the title (blue, clickable headline) and the description (gray text below it). Together, these are your meta tags — and they directly determine whether someone clicks your link or keeps scrolling.
The Meta Tag Generator helps you create optimized meta titles and descriptions that drive clicks.
Meta title best practice: Keep it under 60 characters, put your target keyword near the front, and include your brand name at the end. Example: “Free BMI Calculator | Check Your Body Mass Index Online — FreeToolz”
Meta description best practice: 150-160 characters, include a benefit and a call to action. Example: “Calculate your BMI instantly with our free online BMI calculator. No signup required. Works on mobile and desktop. Get your results in seconds.”
The FreeToolz SERP Preview Tool shows exactly how your page will appear in Google search results. Before publishing any page, preview it here and make sure the title and description are compelling.
Keyword Density: Not What You Think
There was a time when SEO meant stuffing your page with the same keyword over and over until Google ranked it. Those days are long gone — and getting caught keyword stuffing can actually hurt your rankings.
Keyword density today means using your target keyword naturally in key places: the title, one H1 heading, a few H2 headings, and naturally throughout the body text. There’s no magic percentage — just use the keyword where it makes sense and don’t force it.
The Keyword Density Checker shows you which words appear most frequently on your page. Use it to check that your primary keywords are present but not overused. If your focus keyword appears more than 3-4 times per 100 words, you’re probably overdoing it.
Sitemaps: Giving Google a Roadmap
An XML sitemap is a file that lists every page on your website. When you submit it to Google, search engines use it as a roadmap to find and index your content.
If you don’t have a sitemap, Google has to discover your pages organically — through internal links, backlinks, and manual crawling. This means new pages can take weeks or months to appear in search results. A sitemap solves this.
The XML Sitemap Generator takes your list of URLs and generates a proper sitemap.xml file. Upload it to your site’s root directory and submit it through Google Search Console.
What to include in your sitemap:
- All important pages (add each URL)
- Last modified date (when content was most recently updated)
- Priority (signal which pages are most important, 0.0 to 1.0)
- Change frequency (how often the page content changes)
Robots.txt: Controlling Crawler Access
The robots.txt file tells search engines which parts of your site they’re allowed to crawl. It sits in your site’s root directory and can prevent Google from wasting crawl budget on pages that don’t matter — like admin pages, thank-you pages, or duplicate content.
The Robots.txt Generator creates the correct robots.txt file for your site. You don’t need to know the syntax — just specify which directories to block, and it generates the file for you.
Common robots.txt directives:
- Allow everything:
User-agent: *andDisallow: - Block admin area:
User-agent: *andDisallow: /admin/ - Block entire site (not recommended unless intentional):
User-agent: *andDisallow: /
Important: Robots.txt blocks crawling, not indexing. If other sites link to a blocked page, Google may still index it. Use noindex tags on pages you truly want out of search results.
Heading Structure: The H1 Through H6 Hierarchy
Think of headings as your page’s outline. Google uses them to understand what your content covers and how it’s organized. A clear heading hierarchy makes your content more scannable and easier to rank.
The rule: One H1 per page (the main title), followed by H2 headings for major sections, H3 for subsections, and so on. Never skip levels — going from H1 straight to H3 tells Google something is missing.
The Heading Structure Checker analyzes your page’s heading hierarchy and flags issues like multiple H1s, skipped levels, or missing headings. Run it on every important page before publishing.
Example of good heading structure:
- H1: “Free Online BMI Calculator”
- H2: “How BMI Is Calculated”
- H2: “What Your BMI Score Means”
- H3: “Underweight Category”
- H3: “Normal Weight Category”
- H2: “Limitations of BMI”
- H2: “Frequently Asked Questions”
Readability: Writing for Humans First
Google’s algorithms increasingly prioritize content that’s easy to read and understand. Long, complex sentences and jargon-heavy paragraphs signal to search engines that your content might not be helpful for a general audience.
The Readability Checker scores your content on the Flesch Reading Ease scale. The score ranges from 0 (very difficult) to 100 (very easy):
- 60-70: Plain English, good for most audiences
- 70-80: Fairly easy, suitable for general web content
- 80+: Very easy, good for young readers or simple how-to guides
If your content scores below 50, simplify your sentences. Break up long paragraphs. Use shorter words where possible. The goal isn’t to dumb down content — it’s to make it accessible to more readers.
Cache Checking: See What Google Actually Sees
When Google crawls your page, it stores a copy — the cached version. Checking this cache tells you whether Google has seen your latest changes or is still displaying an older version.
The Cache Checker shows you Google’s cached version of any URL and the date it was last cached. If you published an important update 3 days ago but the cache shows last week’s content, Google hasn’t crawled recently. You may need to request indexing through Search Console.
Conclusion
SEO doesn’t require a technical background or expensive software. The fundamentals — meta tags, sitemaps, robots.txt, heading structure, readability — are all manageable with free tools and a little practice.
Start with the basics: create a sitemap if you don’t have one, optimize your meta tags, check your heading structure, and make sure your content is readable. These alone can improve your search rankings more than chasing algorithm updates or link-building schemes.
Browse the full collection of free SEO tools on FreeToolz to check every aspect of your site’s SEO readiness.