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Rendering

JavaScript rendering · Googlebot rendering

Rendering is the engine’s execution of JavaScript to obtain the final DOM. Content injected on the client side can be invisible to a crawler that does not render JavaScript, which is the case for most LLM crawlers.

Standalone definition · 37 words

Category: Technical SEO · Published on October 16, 2026 · Updated on October 17, 2026 · By Aslane Samai, SEO & GEO consultant

How does Google render pages?

Googlebot crawls the URL, then places the page in a rendering queue where a headless browser runs the JavaScript before indexing. This rendering can happen after a delay. Content present in the initial HTML is available sooner than content that depends on rendering.

And AI crawlers?

According to the Vercel and MERJ study (December 2024), the main AI crawlers tested do not execute JavaScript. Content that exists only after rendering escapes them. For engines backed by Google’s index, rendering depends on Google.

How do you check what is rendered?

Compare the raw source with the rendered DOM, use Search Console’s URL Inspection to see Google’s rendering, and test with curl what a bot without rendering retrieves. Look in particular for headings, text, links and structured data.

Frequently asked questions

Does rendering slow down indexing?

It can delay it, because rendering goes through a queue.

Is dynamic rendering recommended?

Google presents it as a transitional solution, not a lasting one.

How do I test my rendering?

URL Inspection, curl and comparing the source with the DOM.