Matan · SEO · Performance
Page size
The HTML payload should stay lean; we cap the check at 500KB of markup.
Pass condition in our engine: HTML size is under 500KB.
1. Problem description
Bloated HTML is often duplicated JSON, inlined SVGs, or a page builder’s soup. It competes with images for bandwidth on the first request. This is not the full page weight (JS/CSS/images) — only the document we fetched.
2. Most common causes
- Entire CSS/JS inlined in <head> and <body>.
- One-page sites dumping every section into one file.
- Debug comments and duplicated widget HTML.
3. How to fix it
- Externalise CSS/JS and use a build step.
- Paginate or split mega-pages.
- Do not base64 large images into HTML.
Test this check
We fetch only this URL (plus robots.txt / llms.txt at the domain root when the check needs them). We do not crawl the rest of the site like a full report.
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