Free Online SEO Tools

The SEO building blocks these tools cover

Meta title & description

The two strings Google shows in search results. Titles are typically truncated past ~60 characters and descriptions past ~155 — our generator counts in real time and renders a SERP preview so you can see the cut-off before publishing.

Open Graph & Twitter cards

The og:title, og:image, twitter:card tags that control how your URL renders on Facebook, X, LinkedIn, and Slack. Get them wrong and every share looks broken.

sitemap.xml

The machine-readable list of URLs you want Google to crawl. A valid sitemap accelerates discovery for new pages and gives Search Console useful coverage diagnostics.

robots.txt

The first file every crawler fetches. It controls which URL patterns get indexed and points at your sitemap. A single misplaced Disallow: / can deindex an entire site.

URL slugs

Short, lowercase, dash-separated paths derived from the page title — important for both ranking and the link previews humans actually click on.

Readability scores

Flesch Reading Ease, Flesch–Kincaid Grade Level, and Gunning Fog measure how hard a piece of text is to read. Most consumer-facing content targets Grade 8 or below; legal and academic content sits higher by design.

HTTP status codes

The 1xx-5xx response codes that crawlers act on. Knowing the difference between a 301, 302, 307 and 308 redirect — or a 404 vs. 410 — directly affects how Google treats removed and moved pages.