SSR Checker

If you’re a web developer, SEO auditor, or QA engineer wanting a quick and visual way to verify server-side rendering (SSR) on any web page, Crawlably’s SSR Checker is a standout tool. This no-cost, browser-based solution makes diagnosing CSR vs. SSR visibility intuitive—ideal for optimizing performance, accessibility, and crawlability.

🔑 Key Features

1. Visual Side‑by‑Side Rendering Comparison

Crawlably loads the page twice—once with JavaScript disabled (server-rendered view), and once with JavaScript enabled (regular rendered view). It then displays both versions edge by edge, making it simple to see what content appears only after hydration (i.e. client-rendered).

2. Highlighting of Missing SSR Elements

Elements not included in the SSR output—such as links, images or the largest contentful paint (LCP) element—are visually flagged. These are often key areas bots miss or users experience delays.

3. Bot Simulation & Device Options

You can simulate Googlebot or standard desktop/mobile browsers so you can observe exactly what search engines and users see. This helps ensure critical content is delivered server-side.

4. Ideal for JavaScript-Heavy Frameworks

Designed for modern SPA frameworks like Next.js, React, Vue, Nuxt, Angular, etc. It helps confirm which parts of your interface are truly server-side rendered.

5. No Code Changes Required

This is a purely visual audit tool—no installations, no SDKs. You just provide a URL and get instant insights into SSR behavior and potential SEO or performance gaps.

🚀 How It Benefits Testers & QA Professionals

• Ensure SEO Visibility: Catch missing HTML content that search engines might skip, helping you enhance indexing reliability.
• Client vs. Server Verification: Instantly see what content is SSR vs CSR—critical for diagnosing hydration or delayed rendering issues.
• Performance Gatekeeping: Verify that large content (e.g. LCP image or heading) renders server-side, improving Core Web Vitals and perceived load speed.
• Accessible for Teams: Use it collaboratively as part of SEO audits or performance reviews without developer dependency.
• Detect Regression Over Time: Use flagged runs to spot regressions in server-side rendering behavior across different builds or releases.

✅ How to Use

1. Visit the SSR Checker tool.
2. Enter the target URL.
3. Choose environment to simulate (e.g. desktop, Googlebot).
4. Scan and review the side-by-side views to visually spot elements missing from SSR.

📝 Why It Matters

Server-side rendering has a direct impact on site performance, SEO, and user experience. Unlike most manual inspection tools, Crawlably offers a simple visual audit so you can confidently identify and resolve rendering gaps—no deep technical setup required.

Crawlably’s SSR Checker is a must-have for anyone serious about ensuring their web pages render cleanly, load fast, and remain SEO-friendly.