SPA Framework
Detector
Instantly identify which JavaScript framework powers any website and detect if SSR or prerendering is configured.
Framework Detection
Identifies React, Vue, Angular, Svelte, Next.js, Nuxt, Gatsby, Remix, Astro, and more.
SSR Detection
Checks if the site uses server-side rendering to deliver pre-rendered HTML to crawlers.
SEO Analysis
Evaluates whether the rendering setup is SEO-friendly and provides recommendations.
Detect JavaScript Framework
Supported Frameworks
Detects all major JavaScript frameworks and meta-frameworks
⚛️
React
▲
Next.js
💚
Vue
💚
Nuxt
🅰️
Angular
🔥
Svelte
🔥
SvelteKit
💜
Gatsby
💿
Remix
🚀
Astro
💎
Solid.js
⚡
Qwik
Why Framework Detection Matters for SEO
Client-Side Rendering (CSR) Issues
- ✗Search bots see an empty HTML shell before JavaScript runs
- ✗Content may not be indexed or ranked properly
- ✗Social media previews often appear broken or incomplete
- ✗Crawl budget wasted on pages bots can't fully render
SSR/Prerendering Benefits
- ✓Full HTML content delivered immediately to crawlers
- ✓All pages properly indexed with complete content
- ✓Social media previews display correctly every time
- ✓Better Core Web Vitals and faster perceived load
Frequently Asked Questions
What JavaScript frameworks can this tool detect?
This tool can detect React, Vue, Angular, Svelte, Next.js, Nuxt, Gatsby, Remix, Astro, SvelteKit, Solid.js, Qwik, Preact, and Ember. It identifies frameworks based on characteristic signatures in the HTML and JavaScript.
How does the tool detect if SSR is configured?
The tool analyzes both the raw HTML (what servers send initially) and the rendered HTML (after JavaScript executes). If meaningful content exists in the raw HTML, it indicates SSR or prerendering is active. Empty HTML shells with just a root div suggest client-side rendering only.
Why does it matter if my site uses SSR or CSR?
Client-side rendered (CSR) sites serve an empty HTML shell to search engines, which can cause indexing issues. Server-side rendering (SSR) or prerendering ensures search bots see your full content immediately, improving SEO and social media previews.
What should I do if my site is CSR-only?
You have several options: 1) Migrate to a framework with built-in SSR like Next.js or Nuxt, 2) Implement static site generation (SSG), or 3) Use a prerendering service like Hado SEO that renders pages for search bots without code changes.
Can this tool detect prerendering services?
Yes, the tool can detect if a site is using prerendering by comparing raw and rendered HTML. If the raw HTML contains full content but the site uses a CSR framework, it's likely using a prerendering service or dynamic rendering solution.
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