About SEO Comets

SEO Comets is a free suite of 60 SEO and content tools built for marketers, bloggers, developers and site owners who need fast answers without enterprise price tags.

Every tool runs directly in your browser. Your content, log files and backlink exports are processed locally on your device — we don't store them, and most tools work even without our server being involved. Tools that need live data (page speed, Core Web Vitals) use official public APIs like Google PageSpeed Insights.

The site is supported by minimal, clearly-labeled advertising, which keeps every tool free and signup-free.

What's inside

Keyword Tools (10 tools) · Content & On-Page (10 tools) · Technical SEO (15 tools) · Speed & Performance (5 tools) · SERP & Social (5 tools) · Links & Authority (5 tools) · Tracking & Utilities (10 tools)

Accuracy notes

Estimator tools (keyword difficulty, domain authority) use transparent heuristic formulas and clearly say so — treat them as directional guides, not crawler-backed measurements. Where third-party data is unavailable in a browser (full backlink indexes, live SERP scraping), our tools tell you the best free official source instead of pretending.