SEO Sidekick — Free On-Page & AI SEO Toolkit

Free SEO toolkit: SSR vs CSR rendering check, schema fixes, AI/GEO, indexability & broken links — each with copy-paste code.

SEO Sidekick is a free, private toolkit for checking and fixing the SEO of any page you visit. It opens as a docked side panel, so the page stays visible next to your analysis. No account, no sign-up, no analytics. Open the panel on any page and SEO Sidekick lists what needs fixing, ordered by priority. Every issue comes with a plain explanation, the current and recommended value, and code you can copy or download. What's new in version 2.0 • Crawler view: compares what search engine and AI crawlers receive from your server with what your visitors see, so you can spot firewall or CDN settings that block crawlers, or pages that behave differently for bots. • Content behind clicks: highlights content that only appears after a click, such as "Load more" buttons and tabs that load on demand, which crawlers never trigger. • Before and after: re-check a page to see which issues you fixed, which are new, and which are still open. • Site audit: check up to 500 pages at once from a sitemap or a list of URLs, then export the results to a spreadsheet. • Hand off: create a client-ready report you can save as a PDF, a plain-language summary email, and developer tickets with acceptance criteria. What it checks • A single prioritised action plan that combines every check, with export to a spreadsheet. • Rendering: how much of your content is in the server HTML and what only appears after JavaScript runs, highlighted on the live page. • Page basics: titles, descriptions, headings, images and canonical tags. • Structured data: validation with corrected, downloadable code. • AI search readiness: whether AI tools can access, read and quote the page. • Indexability: status codes, robots rules and sitemaps. • Broken links, international language tags, link highlighting and a search snippet preview. On-device AI On Chrome versions with built-in AI, SEO Sidekick can draft the fix for an issue, such as a better description or image alt text. This runs entirely on your device. Private by design Nothing is collected or sent to us. The extension only makes the requests you trigger, to the site you are checking. Your audit history stays on your device and you can clear it at any time. Built by BuildWithSiddesh.