Crawlably

SSR (Server-side Rendering) Checker

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In Queue Processing Complete

Details

Waiting behind other tasks

Check complete

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Fix SSR for Bots - Without Code Changes

Crawlably automatically delivers fully rendered version of your pages to bots.

Enable Full Rendering for Bots

Visually Spot SSR Issues

Rather than having you compare the HTML to find server-side rendering (SSR) issues, this tool displays the UI for the server-rendered and the regular rendered versions side by side to quickly test for SSR issues.

Frequently Asked Questions

What does this SSR checker tool do?

This tool lets you visually check whether your webpage is server-side rendered (SSR). It also helps you spot which sections of the page are client-rendered and not included in the server-generated HTML.

With this tool, you can compare the CSR (client-side rendered) version of your page with SSR (server-side rendered) version to uncover any SSR vs CSR issues.

It loads your URL twice: once with JavaScript disabled to show the server-rendered version, and once with JavaScript enabled to show the regular version. It then displays both versions side by side, allowing a visual comparison to spot which content is client-rendered and potentially missed by search engines or slower to load for users.

What is Server-side rendering and why does it matter?

Server-side rendering is an approach where the HTML of a webpage is generated on the server and sent to the browser fully formed.

Server-side rendering matters for SEO and performance. Search bots may skip or delay indexing of content that isn't server-side rendered. Server-side rendered content displays faster and improves the core web vitals.

For more on server-side rendering, see this article.

Does this tool simulate Googlebot or just a regular browser?

Based on the selected device type, the tool can simulate Googlebot as well as regular browser (both desktop and mobile).

Can this tool test SSR for SPAs or JavaScript frameworks like React/Vue?

Yes. This tool is especially useful for checking JavaScript-heavy sites, including those built with React, Next.js, Vue/Nuxt and Angular. It helps you confirm which parts of the page are actually rendered on the server vs after hydration.

Does this tool follow redirects?

Yes. This tool loads the provided URL in a real browser and resolves redirects like a real browser would.

What browsers or engines does this tool use under the hood?

This tool uses latest version of headless Chromium browser behind the scenes.

Is there a Chrome extension for this tool available?

This SSR audit tool is currently available only as a web-based application. The web version allows users to share the results via links and retain past test results to help identify regressions over time.

Who is this tool for?

This tool is useful for anyone focused on website SEO, marketing, or performance.

Frontend developers use it to detect SSR issues during the development phase.
SEO professionals and website owners use it to check server rendered content and be sure that HTML rendering issues aren't affecting the SEO or page speed.
Product marketers use it to make sure their marketing efforts aren't negatively affected by SSR issues.