How Search Engines & AI Crawlers See Your Website
Understanding how Googlebot, Bingbot, GPTBot, and other automated crawlers interact with your pages is essential for modern SEO. This guide walks through what happens when a crawler visits your site — from DNS resolution to JavaScript rendering — with interactive examples you can test yourself.
Last updated April 2026. Based on analysis of 14,200+ crawler sessions across 340 websites using a combination of server logs, real user monitoring, and controlled experiments. Study reference: JLH-CRAWL-STUDY-2026-V3
The Anatomy of a Crawl
Every time a crawler visits your page, a predictable sequence of events unfolds. The differences between crawlers lie in which steps they execute and how deeply they go.
| Crawler | JS Rendering | robots.txt | Avg. Crawl Depth |
|---|---|---|---|
| Googlebot | Full (Chromium) | Respected | 4.2 levels |
| Bingbot | Full (Chromium) | Respected | 3.1 levels |
| GPTBot | Partial | Respected | 1.8 levels |
| ClaudeBot | Partial | Respected | 1.5 levels |
| ChatGPT-User | Full (Headless) | Respected | 2.3 levels |
| CCBot | None | Respected | 1.0 levels |
Data source: JLH-CRAWL-STUDY-2026-V3. Methodology: controlled experiments across 340 sites, Jan-Mar 2026.
Does Your Crawler Execute JavaScript?
One of the biggest differences between crawlers is whether they execute JavaScript. The content below is injected via JS after page load — if a crawler can see it, it has a JavaScript rendering engine.
If you're a crawler without JS support, you'll see this placeholder text instead of the actual data below.
Quick Crawl Tester
Enter a URL to see a simplified view of what a crawler would find. This tool runs client-side only — no data is sent to any server.
Related Articles
Live: agents that read this site
last 7 days Every time an AI agent fetches a Markdown view of a post on jlhernando.com (via Accept: text/markdown, a direct .md URL, or a request for /llms.txt, /llms-full.txt, /SKILL.md, or /.well-known/skills.json) a Netlify edge function fires a server-side Plausible event tagged with the agent's vendor. This chart reads that data back via the Plausible Stats API.
PLAUSIBLE_API_KEY Netlify environment variable. Source: Plausible custom events Markdown Read + Agent Resource Read. Updated every 5 minutes.
Page Debug Info
Diagnostic data for this page view (used during development).