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The CSS3 Test — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Web Design And Html →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
dotlambda.org ↗	66 match 1 shared topics	Tufte CSS	en	web-design-and-html	robotsllmsaihumans	emailphone	none
clowdi.io ↗	64 match 1 shared topics	HTML5 Test Page	en	web-design-and-html	robotsllmsaihumans	emailphone	none
acropoline.com ↗	64 match 1 shared topics	Home :: SITE TEST	en	web-design-and-html Concrete5	robotsllmsaihumans	emailphone	none
ronwheatleydesign.com ↗	64 match 1 shared topics	Unknown – Test Site	en	web-design-and-html WordPress WooCommerce	robotsllmsaihumans	emailphone	none
dpi-laboratorio.com ↗	63 match 1 shared topics	DPI srl ® - Area Test	en	web-design-and-html	robotsllmsaihumans	emailphone	none
badatcss.com ↗	63 match 1 shared topics	Bad at CSS	en	web-design-and-html	robotsllmsaihumans	emailphone	none
rizkyviali.com ↗	63 match 1 shared topics	Rizky, The Creative Generalist	en	web-design-and-html	robotsllmsaihumans	emailphone	none
doomtheweb.com ↗	63 match 1 shared topics	Doom The Web	en	web-design-and-html	robotsllmsaihumans	emailphone	none
classlesscss.com ↗	62 match 1 shared topics	Classless CSS	en	web-design-and-html	robotsllmsaihumans	emailphone	partial · 8
3sca.com ↗	62 match 1 shared topics	3sca dot com – A testing domain	en	web-design-and-html WordPress	robotsllmsaihumans	emailphone	none
iamthefold.com ↗	62 match 1 shared topics	I am the fold	en	web-design-and-html	robotsllmsaihumans	emailphone	none
aboutthebox.com ↗	62 match 1 shared topics	The Box Website	en	web-design-and-html	robotsllmsaihumans	emailphone	none
iceintheface.com ↗	62 match 1 shared topics	Ice In The Face	en	web-design-and-html	robotsllmsaihumans	emailphone	none
clementraynaud.net ↗	62 match 1 shared topics	Clément Raynaud	en	web-design-and-html	robotsllmsaihumans	emailphone	none
acarboleda.com ↗	62 match 1 shared topics	Top Of The World	en	web-design-and-html WordPress	robotsllmsaihumans	emailphone	none
rizlavie.com ↗	62 match 1 shared topics	The HTML5 Herald	en	web-design-and-html	robotsllmsaihumans	emailphone	none
balejs.com ↗	62 match 1 shared topics	CSS Zen Garden: The Beauty of CSS Design	en	web-design-and-html	robotsllmsaihumans	emailphone	none
adorable-css.com ↗	62 match 1 shared topics	AdorableCSS - The Figma-First CSS Framework	en	web-design-and-html	robotsllmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.