How JSVisible Works
We use a real browser to scan your JavaScript website exactly like Google does. No more blind spots from traditional crawlers.
Enter Your URL
Paste your website URL and click scan. That's it — no setup, no installation, no code changes required.
Real Browser Rendering
Our Chrome-based engine loads your site, executes all JavaScript, and waits for your app to fully hydrate.
Get Actionable Results
Receive a detailed report with prioritized issues, ELI5 explanations, and framework-specific code examples.
What Makes JSVisible Different
Purpose-built features for JavaScript SEO that others don't offer
Real Browser Rendering
Puppeteer (headless Chrome) executes JavaScript exactly like Googlebot does.
All TiersDesktop & Mobile Googlebot
Pixel-level visual difference with similarity scores showing what Google sees vs users.
Pro+JS Error Detection
Catches uncaught exceptions, console errors, and failed network requests.
All TiersInternal Link Analysis
Discover orphan pages and optimize site structure for better crawlability.
All TiersELI5 Explanations
Plain-English explanations with step-by-step fixes and code examples.
All TiersUnder The Hood
Here's what happens when you scan a JavaScript website with JSVisible
Chrome Browser Launch
We spin up a real headless Chrome instance using Puppeteer — the same engine Google uses.
JavaScript Execution
Your React, Vue, Next.js, or Angular code runs completely — all components render, all data fetches.
JS Error Monitoring
We capture uncaught exceptions, console errors, and failed network requests as they occur.
Hydration Wait
We wait for your SPA to fully hydrate — dynamic content, lazy-loaded components, everything.
Internal Link Analysis
We track all internal links to identify orphan pages and analyze your site's link structure.
DOM Analysis
We inspect the fully-rendered DOM for SEO issues: meta tags, headings, Open Graph, structured data, and more.
Report Generation
Issues are prioritized by severity and grouped with ELI5 explanations and code examples for your specific framework.
// What JSVisible does under the hood
const browser = await puppeteer.launch();
const page = await browser.newPage();
// Monitor for JavaScript errors
page.on('pageerror', err => jsErrors.push(err));
page.on('console', msg => {
if (msg.type() === 'error')
consoleErrors.push(msg);
});
// Load your JavaScript site
await page.goto(url, {
waitUntil: 'networkidle0'
});
// Wait for full hydration
await page.waitForSelector('[data-hydrated]');
// Analyze the RENDERED DOM
const seoData = await page.evaluate(() => {
return {
title: document.title,
meta: document.querySelector('meta...'),
h1: document.querySelector('h1'),
ogTags: document.querySelectorAll('...'),
internalLinks: document.querySelectorAll('a'),
// ... 35+ SEO checks
};
});
// Generate report with ELI5 explanations
return analyzeIssues(seoData, jsErrors);The Problem With Traditional Tools
Traditional SEO crawlers don't execute JavaScript — they see your site's empty shell, not what users and Google actually see.
Traditional Crawlers
What they see
HTML Source (No JS)
<html>
<head>
<title></title>
<meta name="description" content="">
</head>
<body>
<div id="root"></div>
<script src="app.js"></script>
</body>
</html>JSVisible
What we see
Rendered DOM (After JS)
<html lang="en">
<head>
<title>My App | Dashboard</title>
<meta name="description"
content="Manage your...">
<meta property="og:title"...>
</head>
<body>
<h1>Welcome Back, User</h1>
<nav>...</nav>
<main>...</main>
</body>
</html>What We Check
JSVisible analyzes 35+ critical SEO factors on every page
Page Titles
Missing & length
Meta Descriptions
Presence & length
H1 Tags
Missing & multiples
Heading Hierarchy
Skip detection
Canonical URLs
Duplicate prevention
Open Graph
Title, desc, image
Twitter Cards
Social previews
Image Alt Text
Accessibility
Structured Data
JSON-LD detection
Viewport Meta
Mobile-friendliness
Noindex Check
Indexability
HTTPS
Security check
Lang Attribute
Accessibility
Page Load Time
Performance
HTML Size
Page weight
Content Length
Word count
Favicon
Brand presence
Duplicate Titles
Cross-page check
Internal Links
Orphan detection
All TiersJavaScript Errors
Console & exceptions
All TiersAnd More...
Always improving
Set It and Forget It
Schedule automatic scans to monitor your SEO. Pro users get weekly/monthly scans, Enterprise users unlock daily frequency for real-time monitoring.
- Pro: Weekly/monthly • Enterprise: Daily
- Email alerts when new issues appear
- Track SEO health over time
- Never miss a deployment regression
Scheduled Scans
3 activeWorks With Any JavaScript Framework
If it runs JavaScript, we can scan it
Ready to See What Google Sees?
Scan your JavaScript website in 1-2 minutes. No signup required for your first scan.
✓ Free forever tier · ✓ No credit card required · ✓ Fast results