Site Audit
Your site audit tool is only
reading half your site.
Most crawlers hit the raw HTML response and stop there. VisibilityIQ also runs a full headless-browser pass and diffs the two outputs — surfacing the SEO issues that only exist after JavaScript executes.
What render-parity diff finds
JavaScript frameworks — React, Vue, Next.js, Nuxt, Angular — modify the DOM after the initial HTML response. The gap between what your server returns and what a browser actually renders is where SEO issues hide.
| Raw HTML State | JS-Rendered State | Severity |
|---|---|---|
| Title present | Title overwritten by JS framework | Critical |
| noindex absent | noindex injected dynamically | Critical |
| No canonical tag | Canonical injected via React Helmet | High |
| Structured data absent | JSON-LD injected after render | Medium |
| Body text: 0 words | Body text: 2,400 words (JS-rendered) | High |
Full audit scope
Title tag presence + render-parity
Meta description presence + length
Canonical chain analysis
noindex detection (raw + rendered)
Redirect chain analysis
Broken internal links
Missing or duplicate H1
Image alt text coverage
Lazy-loaded structured data
Core Web Vitals (via CrUX)
PageSpeed score integration
robots.txt and sitemap consistency
Hreflang validation
Orphaned pages detection
Crawl depth mapping
Render-Parity Diff View
Side-by-side diff of raw HTML vs. headless-rendered DOM with highlighted delta — missing tags, injected directives, and structural changes flagged by URL.
Find what your current audit tool misses.
Full technical site audit included. $59.95/mo, everything included.
Start your audit — $59.95/mo