Tool · Content Parity Checker

# See your site the way AI crawlers do

Fetch any page as a human, as GPTBot, as ClaudeBot, and as PerplexityBot — and compare. Spot cloaking, JavaScript-only pages that hide from crawlers, and hydration mismatches. Free. No signup required.

We fetch your page four times — once as a normal browser, then as `GPTBot`, `ClaudeBot`, and `PerplexityBot` — and compare what they get. Cloaking, JavaScript-only pages, hydration mismatches, and paywall gates show up instantly. Free. No signup required.

## Why parity matters

Google's guidelines have always required that the content you show a crawler match the content you show a human. AI systems now enforce the same rule — if `ClaudeBot` gets a blank page while your visitors see a rich article, Claude can't cite you. Common causes:

- **Client-side rendering** — the crawler receives a JS shell it can't execute
- **Cloaking** — different HTML served to non-human user-agents (violates search guidelines)
- **Paywall gates** — humans see the content, crawlers get a signup wall
- **Hydration mismatches** — SSR HTML differs from the client render
- **Bot-specific 403s or empty responses** — WAF or Cloudflare rules blocking AI UAs at the edge

## How this tool works

1. We fetch your page as a normal Chrome browser
2. Then in parallel as GPTBot, ClaudeBot, and PerplexityBot (with their real user-agent strings)
3. We measure word overlap, response size, HTTP status, title, and meta description
4. We flag high/medium/low-severity issues and give an overall parity score

Note: this tool sees your public server response. Some sites gate crawlers by IP range too — we can't detect that; a rich crawler response here doesn't rule out edge-based cloaking. Google's [cloaking policy](https://developers.google.com/search/blog/2010/06/first-cloaking-then-redirects) applies.

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Source: https://www.crawlreadiness.com/tools/parity