Raw HTML vs rendered HTML comparer
Compare the first HTML response with the content available after JavaScript renders the page.
The result highlights how much readable content exists before JavaScript compared with the rendered page.
Paste a homepage URL. Bare domains are checked on www by default.
Switch between checks without hunting through the site.
See what crawler-style requests can read.
Compare the first HTML response with rendered content.
Score crawler access, metadata, and thin-content issues.
Check crawler rules and AI-agent discovery files.
Check up to 10 sitemap or pasted URLs.
When to use this tool
Your app ships a small root div and JavaScript bundle before real content appears.
You need to show why a finished browser preview does not prove crawler readability.
Use the gap to decide whether rendered HTML for bots would solve the problem.
Read it as crawler access, not SEO magic.
Use this comparison to spot the gap between the first HTML response and the page visitors see after JavaScript runs.
It does not promise rankings, traffic, or AI citations. It tells you whether bots are getting useful HTML from the request path.
Low readable text, missing title or H1, failed bot checks, or a large raw-versus-rendered gap.
Bots receive enough readable content, important metadata is present, and the page does not depend on a blank shell.
Very low readable text, generic metadata, missing headings, blocked crawler access, or a large raw-versus-rendered gap.
If the rendered page has much more content
Serve that rendered HTML to crawler requests so search engines and AI crawlers do not have to rely on the app shell.