Free Tool
Free JavaScript SEO Checker
Check if search engines and AI bots can see your JavaScript site. Enter any URL for an instant analysis — no signup required.
What This Tool Checks
Title Tags
Verify your page has a unique, keyword-rich title tag visible in the raw HTML — not just injected by JavaScript.
Meta Descriptions
Check if your meta description is present in the initial HTML response before JavaScript executes.
Canonical URLs
Ensure canonical tags are set correctly to prevent duplicate content issues across your SPA routes.
Schema Markup
Detect JSON-LD structured data in your HTML source — critical for rich snippets and AI understanding.
Open Graph
Validate Open Graph meta tags for proper social sharing previews on Twitter, LinkedIn, and Slack.
JS Rendering
Detect if your site is a JavaScript SPA and whether bots can read your content without executing JS.
Why JavaScript Sites Have SEO Problems
When a search engine or AI bot visits your site, it downloads the HTML response from your server. For JavaScript-rendered sites (React, Vue, Angular, Svelte, Lovable, Bolt, Replit), that HTML is typically an empty shell like <div id="root"></div>. All your content — text, headings, images, meta tags — only appears after JavaScript executes in a browser.
While Google's crawler can execute some JavaScript, it's unreliable and slow. AI bots like ChatGPT, Claude, and Perplexity typically don't execute JavaScript at all. The result: your site is invisible to most of the web's crawlers.
Pre-rendering solves this by serving a fully-rendered HTML snapshot to bots while keeping the normal JavaScript experience for human visitors.
Fix your JavaScript SEO in 2 minutes
Crawlable pre-renders your site for 150+ bots, auto-optimizes your SEO with AI, and monitors your rankings and AI citations — all from a single dashboard. Get started →