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Compare two public pages, such as staging and production, and list what differs in structure and findings

Page diffProFor developers, agencies and designers

Pro

Needs a Pro key ($5 a month, 7 days free).

Before: what you give it

The example input, as typed in. You give it a page address.

url: https://designers.allthepossibles.com
compareUrl: https://allthepossibles.com

After: what comes back

The first lines of a real run on that input. Nothing here is edited by hand.

# Page diff

**Coverage: read 2 of 2 pages.** A: https://designers.allthepossibles.com/ (status 200). B: https://allthepossibles.com/ (status 200). Requests used: 4 of 100.
robots.txt: https://designers.allthepossibles.com read; https://allthepossibles.com read. User agent: Mozilla/5.0 (compatible; ATPDesigners/1.0; +https://designers.allthepossibles.com).

**Differences found in:** Title, Description, og:title, og:image, Text length (characters), HTML bytes, Headings, Links, Stylesheets, Accessibility findings.

## Metadata

| Field | A | B | |
| --- | --- | --- | --- |
| Title | Designers: small tools for people who design | All the Possibles: tools that check themselves before they ship | differs |
| Description | 141 small deterministic tools for designers: contrast and APCA, page ... | Small tools that check themselves before they ship: Preflight, Design... | differs |
| Canonical | / | / | same |
... full output on the tool page

What you get

A structural diff of metadata, landmarks, headings, links, images, assets and static accessibility findings

What it cannot do

Two public pages only, static HTML; it compares structure, not rendered appearance.

Who it is for

  • Developers
  • Agencies
  • Designers

Free and Pro

FreeNot included. This tool is part of Pro.
ProNo daily limit, 300 requests a minute.

What each plan includes

Use it from your assistant

The tool is called site_page_diff. Connect the server once, then ask for it by name or just describe the job. Install steps for each app.

claude mcp add --transport http designers https://designers.allthepossibles.com/mcp
curl -X POST https://designers.allthepossibles.com/api/site-page-diff -H 'content-type: application/json' -H 'authorization: Bearer YOUR_KEY' -d '{"url":"https://designers.allthepossibles.com","compareUrl":"https://allthepossibles.com"}'

Try it here

The form starts with the same example input, so you can run it first and then swap in your own. Pro tools ask for a key.

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