★ NEW EXHIBITS APPEAR WITHOUT WARNING ★ SUBMIT ONLY A DOMAIN — OUR ROBOT FINDS /404 ★ SOFT 404s MAY BE OVERRIDDEN BY THE CURATOR ★

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WHATWG keeps the fallback compact and green

A small white panel contains a green question-mark emblem, four navigation buttons, and plain recovery advice.

whatwg.org/404 — desktop + phone evidence
Desktop viewport · 1440 × 900
whatwg.org: A small white panel contains a green question-mark emblem, four navigation buttons, and plain recovery advice., captured at a desktop viewport
Phone viewport · 390 × 844
whatwg.org: A small white panel contains a green question-mark emblem, four navigation buttons, and plain recovery advice., captured at a phone viewport

HTTP 200

Soft 404 · curator-approved. This capture shows a missing-page message, but the source returned HTTP 200, not HTTP 404.

Domain: whatwg.org

Captured: August 31, 2026

Views: desktop + phone capture

  • web-standards
  • legacy
  • helpful

Curator's note

The copy distinguishes a broken link within the site from one arriving from elsewhere and suggests reporting it accordingly. The compact panel remains recognizably document-like instead of adopting a full-screen promotional layout.

This screenshot documents an external site. Copyright and trademarks remain with their respective owners. Request a correction or takedown.

mailchimp.com — HTTP 404
Mailchimp illustrated 404 page

Mailchimp admits it is lost

A restrained utility page explains the dead end and offers one bright route back to the homepage.

  • copywriting
  • minimal
  • helpful
dropbox.com — HTTP 404
Dropbox hand-drawn 404 page

Dropbox draws the impossible

A hand-drawn wrong turn with plenty of useful exits.

  • illustration
  • minimal
  • helpful
airbnb.com — HTTP 404
Airbnb 404 page with a dropped ice cream animation

Airbnb waters the wrong turn

A tiny character tends an equally tiny plant beside a large, immediate ‘Oops!’

  • illustration
  • character
  • helpful
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