ToolSimpli's free SEO tools cover the checks you actually run before a page goes live. Generate the meta tags, Open Graph tags and canonical link that decide how a page looks when it is shared or listed, preview the result as a SERP snippet, and confirm the title and description fit before Google truncates them.
Structured data is where most sites lose rich results. The schema markup generator writes valid JSON-LD for articles, products, FAQs, breadcrumbs, local businesses and reviews, and the structured data validator checks what you already have — so a missing required field is caught here rather than in Search Console six weeks later.
For on-page work, paste your HTML and get the heading structure, image alt coverage, internal and outbound links, anchor text spread and code-to-text ratio in one pass. Content tools cover keyword density, keyword prominence, keyword combinations and a content brief you can hand to a writer. Technical tools generate robots.txt, XML sitemaps, hreflang tags and .htaccess redirects, and test a robots.txt against a URL before you deploy it.
Every tool runs on what you paste in. Nothing is crawled, nothing is stored, and no account is needed. Pick a tool below and get the answer in a couple of seconds.