Raw HTML vs Rendered HTML

Use this comparison to see what the first HTML response contains and what becomes available after JavaScript renders the page.

Open Raw HTML vs Rendered HTML

When to use it

Run this tool when:

• a browser preview looks complete but raw HTML looks thin
• a React or Vite app ships an application shell first
• metadata or headings may be added by JavaScript
• you need evidence before choosing a rendering solution
• the Bot View Checker reports limited readable content

What the two versions mean

Raw HTML is the initial document returned before browser JavaScript builds the interface.

Rendered HTML represents the content available after the page runs in a browser environment.

The comparison focuses on meaningful differences such as readable text, headings, metadata, and page structure. A difference in byte size alone does not prove a problem.

How to run the comparison

1. Enter one important public URL.
2. Run the comparison.
3. Compare readable text rather than markup size alone.
4. Check whether headings and metadata exist in both versions.
5. Identify important content that appears only after rendering.

How to interpret the result

If both versions expose similar meaningful content, the page may already provide a crawler-readable response.

If raw HTML exposes limited visible content while rendered HTML exposes the page copy, headings, pricing, documentation, or links, the difference may indicate a crawler-readability issue.

Not every difference needs fixing. Interactive controls, account data, and visitor-only interface state do not need to be exposed to crawlers.

Important limitations

The tool demonstrates a technical rendering difference. It does not determine whether every crawler executes JavaScript, whether a URL will be indexed, or how it will rank.

Only public pages should be tested. Do not use it to expose authenticated or personalized content.

Recommended next step

Use the JavaScript SEO Score for a broader technical summary. If important public content is available only after rendering, review the setup documentation before changing DNS or middleware.