What You Can Audit
Comprehensive technical SEO analysis covering every aspect of your site.
Unlimited Crawling
Crawl any website with no URL limits. Our spider handles sites with millions of pages.
Broken Link Detection
Find all 4xx and 5xx errors, broken internal links, and missing resources automatically.
Duplicate Content
Identify duplicate titles, meta descriptions, H1 tags, and near-duplicate page content.
Schema Validation
Validate JSON-LD, Microdata, and RDFa structured data against Schema.org standards.
JavaScript Rendering
Full Chromium-based rendering to crawl modern JavaScript frameworks like React and Vue.
Core Web Vitals
Analyze LCP, FID/INP, and CLS metrics via PageSpeed Insights integration.
100+ SEO Checks
Our SEO Spider analyzes every aspect of your technical SEO.
Frequently Asked Questions
How many pages can Onpage.ai crawl?
Onpage.ai can crawl unlimited pages. There are no URL limits on paid plans. The crawl speed depends on your machine and network, but typically crawls 50-200 pages per second.
Does Onpage.ai support JavaScript rendering?
Yes, Onpage.ai includes full JavaScript rendering using Chromium. This allows you to crawl modern React, Vue, Angular, and other JavaScript-heavy websites just like Google does.
What SEO issues can Onpage.ai detect?
Onpage.ai detects 100+ SEO issues including broken links (4xx/5xx errors), missing/duplicate meta tags, duplicate content, redirect chains, orphaned pages, missing alt text, schema validation errors, Core Web Vitals issues, and more.