Websites Powered by Flat UI
3,471 websites tracked using Flat UI (UI frameworks) · designmodo.github.io
Flat UI is a UI/CSS framework used to style and lay out the site. Its official site is designmodo.github.io. PoweredBy tracks the websites that use Flat UI across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the ui frameworks ecosystem.
Usage trend
500
1K
1.5K
Apr 2018
May 2020
Jun 2022
Jul 2024
Aug 2026
Domains observed using Flat UI in each month's HTTP Archive crawl,
Apr 2018 to Aug 2026 · peak 1,371 in Nov 2022. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 2.1 s
INP 75 ms
CLS 0
TTFB 900 ms
Median site among 1,054 Flat UI sites with Chrome UX data, p75 values, Aug 2026.
Top countries
United States
310
United Kingdom
215
India
209
Germany
145
Spain
136
Canada
132
France
124
Italy
124
Sites using Flat UI by audience country, Chrome UX Report.
Top sites by authority
9+
<1% · 1 of 372 sites
8+
<1% · 15 of 7,677 sites
7+
<1% · 27 of 45,712 sites
6+
<1% · 37 of 110,136 sites
5+
<1% · 53 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Flat UI in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Flat UI
No sites to list from recent crawls.
Compare Flat UI
- Flat UI vs Bootstrap
- Flat UI vs Animate.css
- Flat UI vs Tailwind CSS
- Flat UI vs ZURB Foundation
- Flat UI vs Radix UI