⚡ Standards in the Czech Republic

Web standards are a set of guidelines and specifications that define and describe various aspects of the World Wide Web.

The Czech Republic is a Central European country with a population of around 10.5 million people.

According to our statistics, standards are used on 90.5% of websites from the Czech Republic.

⭐ Most Popular in 2026

The following chart shows the top standards on websites in the Czech Republic in 2026, based on market share.

The most popular is CSS with an impressive share of 97.5%, followed by HTML with 90.4% and Open Graph with 50.7%.

CSS 97.5%
HTML 90.4%
Open Graph 50.7%
DNS Prefetch 23.8%
JSON 22.7%
Preconnect 22.3%
RSD 22.2%
Preload 19.2%
SearchAction 18.3%
XFN 13%
Pingback 10.6%
XHTML 7.7%
Speculation Rules 7.2%
Less 3%
OpenSearch 1.4%

🚀 Highlights

Here is a list of the top standards that are more popular in the Czech Republic than worldwide.
Differences between global and country rankings are shown in parentheses.

4. DNS Prefetch ^(-2)
6. Preconnect ^(-2)
8. Preload ^(-1)
11. Pingback ^(-1)
12. XHTML ^(-1)
14. Less ^(-11)
15. OpenSearch ^(-4)
16. Prefetch ^(-1)
18. XML ^(-10)
19. GraphQL ^(-1)

✨ Top Web Standards

Below is a more detailed list of the top 25 of the 48 standards used on sites from the Czech Republic, ranked by their market share.

Rank	Name	Market share
1	CSS Cambridge, Massachusetts, United States A stylesheet language used to control the presentation of HTML and XML documents, defining layout, colors, typography, and responsive behavior across different devices.	97.5%
2	HTML Cambridge, Massachusetts, United States A markup language used to create web pages and is the de facto standard for documents displayed in web browsers.	90.4%
3	Open Graph Menlo Park, California, United States Enables any web page to become a rich object in a social graph.	50.7%
4	DNS Prefetch Cambridge, Massachusetts, United States The rel="dns-prefetch" attribute on HTML elements.	23.8%
5	JSON A lightweight, language-independent data exchange format derived from JavaScript and used to structure and transmit data between systems.	22.7%
6	Preconnect Cambridge, Massachusetts, United States The rel="preconnect" attribute on HTML elements.	22.3%
7	RSD An XML format that helps client software find the services needed to read, edit, or "work with" weblogging software.	22.2%
8	Preload Cambridge, Massachusetts, United States The rel="preload" attribute on HTML elements.	19.2%
9	SearchAction Cambridge, Massachusetts, United States A structured data type from Schema.org that describes a website's search capability.	18.3%
10	XFN An HTML microformat that provides a simple way to represent human relationships using links.	13%
11	Pingback A method for web authors to request notification when somebody links to one of their documents.	10.6%
12	XHTML Cambridge, Massachusetts, United States An XML-based markup language that extends HTML 4.	7.7%
13	Speculation Rules Mountain View, California, United States API is used to improve navigation performance by prefetching or even prerendering future navigations.	7.2%
14	Less A backward-compatible CSS language extension inspired by Sass that supports variables, mixins, operations, and functions.	3%
15	OpenSearch Seattle, Washington, United States A specification that describes a website's search engine, enabling browsers, apps, and services to discover and integrate it.	1.4%
16	Prefetch Cambridge, Massachusetts, United States The rel="prefetch" attribute on HTML elements.	1.2%
17	OAuth Fremont, California, United States An open standard authorization protocol that allows applications to obtain limited access to user accounts without sharing passwords across web, mobile, and desktop environments.	1.2%
18	XML Cambridge, Massachusetts, United States A markup language and file format for storing, transmitting, and reconstructing arbitrary data.	1.2%
19	GraphQL Menlo Park, California, United States A data query and manipulation language for APIs typically used for remote client-server communications.	1.2%
20	Sass A stylesheet language that compiles to CSS and allows developers to use variables, nested rules, mixins, and functions.	0.9%
21	IAB TCF Brussels, Belgium An open-source industry standard developed by IAB Europe that helps companies comply with GDPR and ePrivacy requirements when processing personal data in digital advertising ecosystems.	0.8%
22	YAML A data serialization language designed to be human friendly and work well with modern programming languages for common everyday tasks.	0.7%
23	OpenID San Ramon, California, United States A decentralized authentication protocol based on OAuth 2.0 that enables applications to verify a user's identity through an external identity provider instead of managing credentials directly.	0.7%
24	Acceptable Ads Berlin, Germany A set of criteria defined by the independent Acceptable Ads Committee that allows publishers to reach ad-blocking users with respectful, non-intrusive and relevant ads.	0.7%
25	Humans.txt A text file that can be created by developers to list the people who have contributed to a website.	0.4%

👉 See Also

🌎 Standards in other countries

Data is based on the analysis of 36,163 websites from the Czech Republic.
Statistics were last calculated on March 21, 2026.
For details, see our methodology and disclaimer.