Free Online SEO Tools and Checkers
SEO tools that fetch a page live and check it the way Google, Bing and Baidu read it, from titles and headings to robots.txt, sitemaps and the crawlers you let in.
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SEO Tools: all 18 tools
Audit a page
SEO Checker runs more than 40 checks on one URL, from title width to HTTPS, and gives a score out of 100 with a fix for each problem. Meta Tag Checker looks closely at the head: title and description width in pixels, robots, canonical and social tags, fetched as a browser, Googlebot or Baiduspider. Heading Tags Checker draws the H1–H6 outline, Image Alt Text Checker lists every picture with its alt text, and Keyword Density Checker counts the words and phrases a page repeats. Before you publish, SERP Snippet Preview shows where Google, Bing and Baidu would cut your title and description.
Links, structured data and share cards
Broken Link Checker tests up to 150 links on a page, or 500 with VIP, and puts the broken ones at the top. Link Analyzer lists internal and external links with their nofollow, sponsored and ugc values. Structured Data Checker reads JSON-LD and microdata and names missing properties, and Open Graph Checker previews the card a link makes on Facebook, LinkedIn, X and WeChat.
Crawling and indexing
Robots.txt Tester shows the rule that decides for 20 crawlers, from Googlebot and Baiduspider to GPTBot. Indexability Checker gives separate verdicts for Google and Baidu, with every reason a page can't be indexed. Sitemap Checker validates XML and text sitemaps, Search Engine Spider Simulator compares what a crawler and a visitor receive, Verify Googlebot and Baiduspider IPs separates real crawlers from impostors in your logs, and AI Crawler Checker covers 25 AI bots and llms.txt. When pages change, IndexNow URL Submitter notifies Bing, Yandex and other IndexNow engines.
How the checks run
Checks run on our server the moment you click. The results aren't stored and they don't use your daily tasks, while an hourly allowance per visitor, higher once you sign in, keeps things fair. We only fetch public web addresses. SERP Snippet Preview runs entirely in your browser. Tables export to CSV and full reports download as JSON. An AI writer for titles and descriptions is coming soon.