Free SEO Tools

The SEO tools are for people who look after how pages appear in search results and social feeds, from a blogger checking one post to a developer preparing a new site. Typical jobs are writing a title and meta description, adding structured data, setting crawl rules and confirming that an old URL redirects where it should.

Four of the nine tools write code to paste into a site. The Meta Tag Generator produces title, description, robots, Open Graph and Twitter Card tags. The Schema Markup Generator outputs JSON-LD for types such as Article, Product and FAQ Page, and the robots.txt and XML sitemap generators build those two files. The others check pages or text. The SERP Preview Tool lays out a title and description as a desktop or mobile result, the Keyword Density Analyzer counts how often words appear in pasted text, and the Readability Score Checker reports Flesch Reading Ease and Flesch-Kincaid grade level.

Most of the group runs entirely in the browser. Three tools use the site's server:

• The Open Graph Checker sends a URL to the server, which fetches the page and reads its tags for the social previews.
• The Redirect Checker has the server follow a chain of up to 20 hops and report the status code, headers and response time of each hop.
• The XML Sitemap Generator crawls a site from the server in its Crawl Site mode, capped at 500 pages. Its manual entry and bulk paste modes stay in the browser.

There is no all-in-one SEO checker here. Each tool checks or builds one thing, which makes the result easier to act on: a title and meta description that fit the results page, structured data you can paste into a template, a robots.txt file that doesn't block the pages you want found, a sitemap that lists them, and redirects that reach the final URL in one hop. Together they cover most of the on-page SEO work a page needs before and after it goes live.

If you are new to these jobs, start with the guides on writing title tags, what a meta description does and canonical tags. Word counts and reading time are handled by the Word Counter in the writing tools.