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Technology · Web Development

Bootstrap

getbootstrap.com

Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. Developed by Twitter, it contains HTML, CSS, and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components. Bootstrap's grid system and pre-styled components make it easy to create responsive layouts quickly. Its extensive documentation and large community make it one of the most popular front-end frameworks for building responsive websites and web applications.

Bootstrap belongs toUI frameworkscategory.

314websites

use it — 12.3% of the 2,555 websites we scanned in the last 12 months

#1of 33

tools in its category seen in our scans (we recognize 96)

78public pages

on UptimeCard — open any of them to see how that site is doing

16.4% of all websites we track run Bootstrap

At a glance

UptimeCard's own scans and tests of 2,555 websites · refreshed weekly

How Bootstrap sites scoreout of 100 · hover or tap a score for details

50PerformanceLowaverage site: 5088AccessibilityGoodaverage site: 8996Best practicesGoodaverage site: 9392SEOGoodaverage site: 92

Page load time

Loads about 8% slower than the average site

Bootstrap sites
4.6 s
All sites
4.3 s

Most Bootstrap sites load in 3.5–6.9 s. Home page weight: 3.6 MB vs 3.3 MB for all sites. 71 public sites measured.

Where are they hosted?

Mostly Amazon Web Services and Cloudflare

  • Amazon Web Services33%
  • Cloudflare19%
  • Fastly6%
  • Google Cloud6%
  • Other35%
United States 56%Canada 22%Germany 3%

Who uses it?

Educational Resources sites use Bootstrap 2.3× more than average

Technology and Software58%
Business Services13%
Educational Resources2.3× avg12%
Software as a Service (SaaS)4%

Share of 78 classified public sites. “× average” compares with all 961 public sites.

How Bootstrap sites are built

Closest partners. The number says how many times more often the tool runs on Bootstrap sites than on an average website. Hover a partner for its share of sites.

Popper5×Slick3×Font Awesome3×cdnjs3×jQuery UI2×jsDelivr2×

Stacks we see most. Tools that tend to run together with Bootstrap on the same websites. The percentage is the share of all 314 Bootstrap sites that run the whole stack.

10 stacks · swipe, drag or use the arrows
#1

Bootstrap + cdnjs + jsDelivr + jQuery CDN

4.8%15 of 314 sites
#2

Bootstrap + cdnjs + Animate.css

3.5%11 of 314 sites
#3

Bootstrap + cdnjs + Yoast SEO + Contact Form 7

2.5%8 of 314 sites
#4

Bootstrap + jsDelivr + Yoast SEO

3.2%10 of 314 sites
#5

Bootstrap + Elementor + Site Kit

2.9%9 of 314 sites
#6

Bootstrap + cdnjs + YouTube

2.5%8 of 314 sites
#7

Bootstrap + Yoast SEO + Site Kit

2.5%8 of 314 sites
#8

Bootstrap + jsDelivr + YouTube

2.2%7 of 314 sites
#9

Bootstrap + jsDelivr + Animate.css

2.2%7 of 314 sites
#10

Bootstrap + Contact Form 7 + Site Kit

2.2%7 of 314 sites

Usually installed alongside

The bigger the bubble, the more of the 314 Bootstrap sites also run the tool. Colour shows what the tool does. Hover or tap a bubble for details.

Google Analytics69%Facebook Pixel25%Linkedin Insight Tag16%Google Tag Manager65%OneTrust18%Yoast SEO15%Cart Functionality14%Microsoft Advertising13%
AnalyticsTag managerCookie consentSearch visibilityOnline storeAdvertising

Similar tools in its category

UI frameworks: 96 tools known, 33 seen in our scans

Tailwind CSS208 sitesAlternativeMarko149 sitesAlternativeHeroUI60 sitesAlternativeRadix UI41 sitesAlternativeZURB Foundation26 sitesAlternativeMaterial UI24 sitesAlternativeshadcn/ui20 sitesAlternativeCivicTheme15 sitesAlternativeAnimate.css33 sitesUsed together

How websites combine Bootstrap with other tools

Relationships found on the websites that use it, from the same map status pages show.

Complements another tool 49Needs another tool 35Overlaps with another 9Integrates with another 4Built on a platform 2

Websites using Bootstrap

314 websites use Bootstrap: 12.3% of the 2,555 websites we scanned in the last 12 months. A selection is shown below.

Scores are out of 100: P Performance · A Accessibility · B Best practices · S SEO. Green 80+, yellow 65–79, orange 50–64, red below 50. The dot shows whether our last scan found the site failing (red) or not (green); Red, amber or blue: an active incident on the site's status page (outage, degraded, maintenance) or a failing scan; amber also means a certificate ending within 30 days. Hover the dot for details.

Questions about Bootstrap

How many websites use Bootstrap?
We found Bootstrap on 314 of the 2,555 websites we scanned in the last 12 months (12.3%). 78 of them have a public status page.
What is Bootstrap often used with?
Among the websites we scan, Bootstrap is often found alongside PHP (40.8% of its sites), Font Awesome (29% of its sites), reCAPTCHA (28.7% of its sites).
What are the alternatives to Bootstrap?
Other ui frameworks tools we recognize include Tailwind CSS, Marko, HeroUI, Radix UI.

Is your website built with Bootstrap?

UptimeCard checks it around the clock, tells you the minute it stops answering, and gives your visitors a status page.

Monitor my site freeCreate a status page