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modern.css

Old CSS side by side with modern CSS

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120 old CSS patterns next to the modern CSS that replaces them, a CSS audit for any site and an email when new CSS is safe to use. Free.

PH · launched Nov 3, 2026 · 2 upvotes (top 19%) · 0 views

Niche: web design and css extraction tools · 49 launches, 5 in the last 7 days ▼ -44% · Explore this niche →

Category and tags
  • Horizontal
  • Dev tools
  • Developer
  • Not AI
  • Hobby / open-source project
  • Developer Tools

Visit website ↗ Source listing ↗

More like this: all 49 launches in web design and css extraction tools →

Could you build this?

Yes It is a content reference site with pattern pairs, a CSS linter-style audit tool and an email signup, all straightforward web work.

Competitors

Other products that read as similar to this one : 81 launches clear the similarity bar, closest 8 shown.

Attention rank: #18 of 82 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 313 days after the earliest competitor.

  • Modern CSS Quiz · hn · 2026-11-02 · 5 upvotes · similarity 0.56
  • Ambient CSS · hn · 2026-02-17 · 9 upvotes · similarity 0.44
  • Stylegrab · ph · 2026-10-24 · 1 upvotes · similarity 0.44
  • CSS Golf · ph · 2026-11-07 · 1 upvotes · similarity 0.43
  • The Color Sheet · ph · 2026-11-09 · 2 upvotes · similarity 0.42
  • Inspect Boss · ph · 2026-10-28 · 1 upvotes · similarity 0.41
  • chronoskin · ph · 2026-10-13 · 1 upvotes · similarity 0.41
  • Sider Code · ph · 2026-09-01 · 232 upvotes · similarity 0.41

Related data

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.