Free JavaScript SEO checker

See how much of any page Google and AI bots can read without JavaScript, and which AI crawlers are allowed. Free, instant, no login.

3 free checks per day.

What you get

  • Whether your main content lives in the raw HTML or only appears after JavaScript
  • The raw-HTML vs rendered word delta (what non-JS crawlers miss)
  • Which AI bots (GPTBot, PerplexityBot, ClaudeBot, Google-Extended) are allowed to crawl it
  • Why it matters: most AI crawlers run little or no JavaScript, so JS-only content is invisible

Sample result. Run a check on your own URL above.

Example
yourblog.com/best-running-shoes-2025

Content visible without JavaScript

1,840words in the raw HTML

Scripts are ≈ 22% of the page bytes.

Likely AI-readable
Most AI crawlers (GPTBot, ClaudeBot, PerplexityBot) execute little or no JavaScript, so anything that only appears after JS is invisible to them and can't be cited. Server-render or pre-render your main content so it ships in the initial HTML.
AI crawler access
GPTBot
OpenAI
Allowed
OAI-SearchBot
OpenAI (ChatGPT Search)
Allowed
PerplexityBot
Perplexity
Blocked
ClaudeBot
Anthropic
Allowed
Google-Extended
Google (Gemini)
Allowed
Bingbot
Microsoft (Copilot)
Allowed