12 diagnostic tools to test how Google, social crawlers, and AI bots see your JavaScript-rendered website. Free account unlocks starter tools — upgrade for the full suite.
Analyze how search engines see your SPA
Comprehensive SEO audit with A-F grading across 25+ checks
ProPreview your Facebook, Twitter & LinkedIn cards before sharing
ProSee the gap between what Google sees and what browsers render
Pro0-100 score across 5 dimensions with letter grade breakdown
StarterPlatform-specific diagnostics and bot testing
Auto-detect Lovable, Bolt, Base44, Replit and get tailored advice
AgencyTest how your site responds to Googlebot, GPTBot, and 4+ bots
AgencySPA-specific CLS, LCP, and INP analysis with fix suggestions
AgencyDetect empty pages, soft 404s, stuck spinners, and thin content
StarterLearn and calculate the impact of prerendering
Calculate the traffic gain and revenue impact of prerendering
Try FreeInteractive quiz to find the right rendering strategy
Try FreeDetect 14+ JS frameworks and rendering configuration
StarterCompare meta tags before and after JavaScript execution
ProSet up prerendering in 5 minutes and make your SPA fully visible to every search engine and AI bot.
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