Webpage Size & Compression Checker
Measure a page's HTML size, check Gzip or Brotli compression and see the server response time....
SEO / Search
Checks and generators for technical SEO: meta tags, canonical URLs, Open Graph, sitemaps and robots.txt, plus previews of how a page may look in search and social. They check what is on the page. They do not predict rankings.
On-Page Broken Link Checker
Check the first 12 links on a single page for 404s and errors using HEAD requests....
All-In-One SEO & Social Preview Studio
Preview a title, description and image as a Google result and as Facebook, X and LinkedIn...
Google SERP Snippet Preview Tool
Type a title, URL and description to see a mock Google result on desktop and mobile,...
Keyword Density & Frequency Analyzer
Paste text to count words, count how often a keyword appears, and see its density and...
Moz Domain & Page Authority Checker
Look up Moz's Domain Authority, Page Authority and Spam Score for a URL through the Moz...
Robots.txt Checker & Syntax Validator
Fetch a site's robots.txt, list its rules and sitemap lines, and flag lines with no colon...
XML Sitemap Checker & Validator
Fetch an XML sitemap or sitemap index and check that it parses, count its URLs, see...
Canonical URL Checker & Validator
Check a page's canonical tag: missing, self-referencing, pointing to another domain, duplicated, or set in an...
On-Page Meta Tag Analyzer
Fetch a URL and check its title and description length, robots and canonical tags, viewport and...
Technical notes
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