Websites using Bootstrap 4.x
Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.
584.3k live Bootstrap 4.x sites, ready to export.
That's how many Bootstrap 4.x websites are in VersionDB right now, each with its full tech stack, contact details, and social profiles.
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Every Bootstrap 4.x website we detected in the United States.
Only sites where a personal, company-hosted email was found.
Sites with at least one personnel LinkedIn profile.
Start with the highest-traffic end of the dataset.
Limit results to Bootstrap 4.x websites on .com domains.
Only sites where an organisation phone number was found.
Which Bootstrap 4.x versions are most used?
We could read a version number on 98% of Bootstrap 4.x sites. Of those, the most common are Bootstrap 4 (exact), on 141,940 sites, Bootstrap 4.3.1, on 94,097 sites and Bootstrap 4.0.0, on 58,730 sites.
- Versions detected
- 19
- Sites with a version
- 571,772
Websites Using Bootstrap 4.x
A sample of live Bootstrap 4.x sites from our latest crawl, with the other technologies each one runs.
| Domain | Also runs | Crawl Date |
|---|---|---|
| lussk.cz | September 27, 2026 | |
| lotopix.digital | September 27, 2026 | |
| lords.ac.in | September 27, 2026 | |
| loki99-7.com | September 27, 2026 | |
| lojaskyglasscanela.com.br | September 27, 2026 | |
| lobpa.dk | September 27, 2026 | |
| lklearning.net | September 27, 2026 | |
| liveexam.co.in | September 27, 2026 | |
| livebola.email | September 27, 2026 | |
| littlesapling.in | September 27, 2026 |
How many websites use Bootstrap 4.x?
We found Bootstrap 4.x on 584,365 websites in our September 2026 crawl, across 210 countries.
Which countries use Bootstrap 4.x the most?
By number of websites, the top countries are United States (17%, 98,950 sites), Japan (8%, 46,429 sites), Netherlands (6%, 33,952 sites), Brazil (5%, 30,228 sites) and France (5%, 29,229 sites). Together they account for 41% of the 584,365 Bootstrap 4.x sites we track. 38% of the sites are in English, and .com is the most used domain ending, on 42% of them.
Where are Bootstrap 4.x websites hosted?
The networks carrying the most Bootstrap 4.x sites are Cloudflare, Inc. (68,902 sites), Amazon.com, Inc. (49,727 sites) and OVH SAS (20,060 sites).
What technologies are used with Bootstrap 4.x?
Across the 584,365 Bootstrap 4.x sites we track, the technologies most often found alongside it are jQuery (94%, 552,088 sites), PHP (54%, 313,931 sites), Cloudflare (50%, 292,534 sites), Popper (46%, 265,927 sites) and cdnjs (42%, 245,017 sites).
Breakdown of Bootstrap 4.x websites
What else they run, plus their language, hosting network, domain extension and country.
| Technology | Sites |
|---|---|
jQuery | 552,088 |
PHP | 313,931 |
Cloudflare | 292,534 |
Popper | 265,927 |
cdnjs | 245,017 |
Nginx | 196,523 |
BootstrapCDN | 193,306 |
Google Analytics | 193,077 |
|
jQuery CDN | 174,889 |
jsDelivr | 168,061 |
MySQL | 160,380 |
WordPress | 154,834 |
Apache HTTP Server | 147,142 |
|
jQuery Migrate | 135,787 |
HTTP/3 | 127,936 |
| HSTS | 124,237 |
reCAPTCHA | 108,461 |
Google Hosted Libraries | 93,081 |
Google Tag Manager | 85,417 |
OWL Carousel | 85,126 |
Slick | 77,238 |
Contact Form 7 | 58,779 |
Font Awesome | 57,694 |
Yoast SEO | 55,482 |
jQuery UI | 52,581 |
| Language | Sites |
|---|---|
| English | 222,399 |
| Japanese | 43,985 |
| French | 34,042 |
| Portuguese | 32,452 |
| Chinese | 27,013 |
| German | 25,132 |
| Spanish | 24,020 |
| Dutch | 18,368 |
| Russian | 17,691 |
| Italian | 10,943 |
| Indonesian | 9,540 |
| Czech | 8,975 |
| Turkish | 8,263 |
| Latin | 7,935 |
| Vietnamese | 7,588 |
| Polish | 7,460 |
| Thai | 5,804 |
| Danish | 3,841 |
| Swedish | 3,647 |
| Tagalog | 3,351 |
| Hungarian | 3,025 |
| Korean | 2,981 |
| Slovak | 2,644 |
| Romanian | 2,432 |
| Catalan | 2,119 |
| ASN | Sites |
|---|---|
| Cloudflare, Inc. | 68,902 |
| Amazon.com, Inc. | 49,727 |
| OVH SAS | 20,060 |
| Hostinger International Limited | 17,111 |
| Xserver Inc. | 15,119 |
| Signet B.V. | 14,856 |
| Fastly, Inc. | 14,071 |
| GMO Internet, Inc. | 13,685 |
| Hetzner Online GmbH | 12,778 |
| Microsoft Corporation | 12,118 |
| IONOS SE | 11,332 |
| Locaweb Servicos de Internet S/A | 11,304 |
| DigitalOcean, LLC | 10,872 |
| Google LLC | 9,830 |
| SAKURA Internet Inc. | 9,159 |
| Cloudflare London, LLC | 8,935 |
| GoDaddy.com, LLC | 8,922 |
| Locaweb Servicos de Internet SA | 6,029 |
| JIMAMBA LLC | 5,800 |
| Scaleway SAS | 5,173 |
| CLOUDFLARENET | 4,981 |
| Liquid Web, L.L.C | 4,902 |
| Akamai Connected Cloud | 4,669 |
| SH.cz s.r.o. | 4,262 |
| Aruba S.p.A. | 3,946 |
| TLD | Sites |
|---|---|
| com | 247,698 |
| br | 27,154 |
| org | 23,736 |
| de | 16,403 |
| jp | 16,071 |
| net | 15,752 |
| fr | 14,417 |
| nl | 13,675 |
| uk | 12,928 |
| ru | 12,895 |
| cz | 8,740 |
| cn | 8,456 |
| it | 7,865 |
| io | 7,283 |
| pl | 6,825 |
| in | 6,788 |
| au | 5,681 |
| ca | 5,260 |
| ch | 5,133 |
| be | 4,474 |
| id | 4,165 |
| vn | 4,053 |
| es | 3,980 |
| eu | 3,854 |
| tw | 3,457 |
| Country | Sites |
|---|---|
| 🇺🇸 United States | 98,950 |
| Unknown | 73,651 |
| 🇯🇵 Japan | 46,429 |
| 🇳🇱 Netherlands | 33,952 |
| 🇧🇷 Brazil | 30,228 |
| 🇫🇷 France | 29,229 |
| 🇩🇪 Germany | 29,003 |
| 🇬🇧 United Kingdom | 19,097 |
| 🇷🇺 Russia | 16,232 |
| 🇮🇳 India | 15,861 |
| 🇨🇦 Canada | 12,981 |
| 🇨🇳 China | 11,443 |
| 🇮🇹 Italy | 11,161 |
| 🇨🇿 Czech Republic | 9,667 |
| 🇪🇸 Spain | 8,622 |
| 🇵🇱 Poland | 8,113 |
| 🇹🇷 Turkey | 7,837 |
| 🇦🇺 Australia | 7,060 |
| 🇻🇳 Vietnam | 6,829 |
| 🇨🇭 Switzerland | 6,104 |
| 🇹🇭 Thailand | 5,798 |
| 🇮🇩 Indonesia | 5,693 |
| 🇧🇪 Belgium | 5,171 |
| 🇸🇬 Singapore | 4,989 |
| 🇹🇼 Taiwan | 4,418 |
FAQ
Answers drawn from our latest crawl of Bootstrap 4.x websites. Anything else, email us and we will look it up.
Through our own crawl, which checks each site's HTML, scripts and headers rather than relying on self-reported data.