Technical SEO Tools
These eight tools handle the technical side of SEO: the tags, files and markup that tell search engines and social networks what a page is and whether to crawl it. They generate meta tags, JSON-LD, robots.txt and sitemaps, and they check live pages for title and description length, Open Graph cards, structured data errors and keyword repetition. Developers, marketers and founders preparing a site for launch, or working out why a link preview looks wrong, use them.
8 free tools · no sign-up · no ads
All SEO Tools (8)
Meta Tag Analyzer
Analyze website meta tags for SEO optimizationOpen Graph Checker
Check Open Graph tags for social media sharingSEO Meta Generator
Generate optimized meta tags for websitesSchema Markup Generator
Generate JSON-LD structured data markupRobots.txt Generator
Generate robots.txt files for search enginesXML Sitemap Generator
Generate XML sitemaps for websitesKeyword Density Analyzer
Analyze keyword density in text contentStructured Data Validator
Validate JSON-LD structured data markup
Which tool do I need?
Write title, description and Open Graph tags for a new page
Fill in the form and copy a complete head block with canonical, robots, Open Graph and Twitter card tags.
Find out why a shared link shows the wrong title or image
Check the og: and twitter: tags the page serves and see approximate previews for each network.
Add JSON-LD for an article or product and check it
Generate the markup from a template, paste it into the page, then validate the code or the live URL.
Tell crawlers what to skip and where my sitemap is
Build robots.txt with Disallow rules and a Sitemap line, and generate the sitemap.xml it points to.
Check whether an article repeats a phrase too often
Paste the body text to see the top words and two-word phrases and the density of a target keyword.
About SEO Tools
Most of the tools come in generator and checker pairs. The SEO Meta Generator writes the head tags; the Meta Tag Analyzer and Open Graph Checker confirm what the deployed page actually serves. The Schema Markup Generator writes JSON-LD; the Structured Data Validator checks it for required properties. The Robots.txt Generator and XML Sitemap Generator work together, since robots.txt should point to the sitemap. The Keyword Density Analyzer is about the copy rather than the markup. A sensible pre-launch order is meta tags, then structured data, then robots.txt and sitemap, then a check of each live URL.
Some honest limits. The analyzer, Open Graph checker and the URL modes of the validator and density tool fetch pages through the public allorigins.win proxy, which can be slow or blocked, and they read server HTML without running JavaScript. The validator follows Google's documented required properties but is not Google's Rich Results Test, and valid markup does not guarantee a rich result. There is no correct keyword density; use it to catch accidental repetition. Googlebot ignores Crawl-delay.
Guides
- Meta Tags That Still Matter: Titles, Descriptions and Open GraphWhich head tags change how a page looks in Google and in link previews, which ones are ignored, and the escaping and rendering bugs that break them.
- JSON-LD Structured Data: What Still Earns Rich ResultsHow JSON-LD, schema.org and Google rich results fit together, which properties are really required, and why FAQ and HowTo markup stopped paying off.
- Robots.txt and XML Sitemaps: How Crawlers Actually Read ThemRFC 9309 matching rules, why Disallow does not remove pages, the 50,000 URL sitemap limit, and which sitemap fields Google ignores.
- Keyword Density: What the Number Means and What It Does NotHow keyword density is calculated, why no search engine publishes a target, and how to use word and phrase counts to edit copy instead of stuffing it.
Frequently asked questions
What is technical SEO?
Technical SEO is the work that lets search engines crawl, understand and display your pages: titles and meta descriptions, canonical URLs, structured data, robots.txt, sitemaps and server-rendered HTML. It sits alongside content quality and links.
Does structured data improve Google rankings?
Not directly. Google uses structured data to understand a page and to make it eligible for rich results such as product prices or article details, which can change how a listing looks and how often it is clicked.
Should I hide a page from search with robots.txt or noindex?
Use noindex on a crawlable page. A page blocked in robots.txt is never fetched, so Google cannot see a noindex on it and may still list the bare URL if other sites link to it.
Why do SEO checkers show different tags than my browser?
Your browser runs JavaScript and shows the final page, while most checkers and social crawlers read only the first HTML response. Tags added by a client-side framework after load are invisible to them.
How often should an XML sitemap be updated?
Whenever pages are added, removed or meaningfully changed. Set lastmod only when the main content changes; a date that moves on every build teaches search engines to ignore it.