SEOTyde by ToolsAid

SEOTyde is a 100% local, privacy-first SEO checker for Firefox.

No AI APIs. No backend server. No tracking. No account required.

• On-page checklist — 100-point score across title, meta description, headings, alt text, canonical, robots, Open Graph, Twitter Card, structured data, and content length
• Live preview — see your Google search snippet and social share card exactly as visitors will
• Speed & links — page weight, load time, request count from the browser's native Performance API, plus a broken-link scanner for internal links
• Competitor compare — fetch any URL and compare its SEO score against your current page, side by side
• Readability & keywords — Flesch Reading Ease score, keyword density checker with on-page highlighting
• Score history — track how your page's score changes over repeat visits, stored only on your device
• Export reports — download a full Markdown audit report for client work

Most SEO extensions either require an account, send your page data to a remote server, or bolt on AI features you didn't ask for. SEOTyde does everything with plain, transparent, client-side JavaScript — you can read exactly what it does because nothing leaves your browser except the specific URLs you choose to check in Competitor Compare or the link checker.


Bloggers, indie developers, freelance SEO consultants, small business owners, and anyone auditing their own or a client's website.