⚡ 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.

Statistics based on 37K+ analyzed websites. About this data

⭐ 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 90.5% and Open Graph with 50.9%.

CSS 97.5%
HTML 90.5%
Open Graph 50.9%
DNS Prefetch 23.9%
JSON 22.9%
Preconnect 22.4%
RSD 22.3%
Preload 19.4%
SearchAction 18.4%
XFN 12.9%
Pingback 10.5%
Speculation Rules 7.8%
XHTML 7.6%
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)
14. Less ^(-11)
15. OpenSearch ^(-4)
16. Prefetch ^(-1)
18. GraphQL ^(-2)
19. XML ^(-9)
20. Sass ^(-2)

✨ 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.	90.5%
3	Open Graph Menlo Park, California, United States A web metadata standard that defines how webpages are described as structured objects for use in social graphs and enables their consistent representation.	50.9%
4	DNS Prefetch Cambridge, Massachusetts, United States The rel="dns-prefetch" attribute on HTML elements.	23.9%
5	JSON A lightweight, language-independent data exchange format derived from JavaScript and used to structure and transmit data between systems.	22.9%
6	Preconnect Cambridge, Massachusetts, United States The rel="preconnect" attribute on HTML elements.	22.4%
7	RSD An XML format that helps client software find the services needed to read, edit, or "work with" weblogging software.	22.3%
8	Preload Cambridge, Massachusetts, United States The rel="preload" attribute on HTML elements.	19.4%
9	SearchAction Cambridge, Massachusetts, United States A structured data type from Schema.org that describes a website's search capability.	18.4%
10	XFN An HTML microformat that provides a simple way to represent human relationships using links.	12.9%
11	Pingback A method for web authors to request notification when somebody links to one of their documents.	10.5%
12	Speculation Rules Mountain View, California, United States API is used to improve navigation performance by prefetching or even prerendering future navigations.	7.8%
13	XHTML Cambridge, Massachusetts, United States An XML-based markup language that extends HTML 4.	7.6%
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	GraphQL Menlo Park, California, United States A data query and manipulation language for APIs typically used for remote client-server communications.	1.2%
19	XML Cambridge, Massachusetts, United States A markup language and file format for storing, transmitting, and reconstructing structured data in a platform-independent way.	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	YAML Seattle, Washington, United States A human-readable data serialization language designed for representing structured data and exchanging it between systems and programming languages.	0.8%
22	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.	0.7%
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

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 37,156 websites from the Czech Republic.
We currently track the presence of 54 standards across the web.
Of these, 48 were detected on websites from the Czech Republic.
Statistics were last calculated on May 5, 2026.
For more details, see our methodology and disclaimer.