⚡ 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 91.1% of websites from the Czech Republic.

Statistics based on 43K+ 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 97.4%, followed by HTML with 91.8% and Open Graph with 53.1%.

CSS 97.4%
HTML 91.8%
Open Graph 53.1%
JSON 25.1%
Preconnect 23.7%
DNS Prefetch 23.2%
Preload 21.4%
RSD 21.2%
SearchAction 18.3%
Speculation Rules 15.9%
XFN 12.1%
Pingback 9.3%
XHTML 6.5%
Less 3%
GraphQL 1.6%

🚀 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.

5. Preconnect ^(-4)
7. Preload ^(-3)
14. Less ^(-12)
15. GraphQL ^(-2)
17. OpenSearch ^(-1)
19. RDF ^(-3)
20. XML ^(-10)
22. Sass ^(-1)
25. Sitemap ^(-3)

✨ Top Web Standards

Below is a more detailed list of the top 25 of the 50 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.	97.4%
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.	91.8%
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.	53.1%
4	JSON A lightweight, language-independent data exchange format derived from JavaScript and used to structure and transmit data between systems.	25.1%
5	Preconnect Cambridge, Massachusetts, United States The rel="preconnect" attribute on HTML <link> elements instructs browsers to establish early connections to external origins before resources are requested.	23.7%
6	DNS Prefetch Cambridge, Massachusetts, United States The rel="dns-prefetch" attribute on HTML <link> elements instructs web browsers to resolve domain names for external resources before those resources are requested.	23.2%
7	Preload Cambridge, Massachusetts, United States The rel="preload" attribute on HTML <link> elements instructs web browsers to fetch important resources early before they are requested during page rendering.	21.4%
8	RSD Wesley Hills, New York, United States An XML format that allows client software to discover services provided by web publishing systems.	21.2%
9	SearchAction Cambridge, Massachusetts, United States A structured data type from Schema.org that describes a website's search capability.	18.3%
10	Speculation Rules Mountain View, California, United States A browser API that improves navigation performance by prefetching or prerendering pages that users are likely to visit next.	15.9%
11	XFN United States An HTML microformat that represents human relationships by adding metadata to hyperlinks between websites and profiles.	12.1%
12	Pingback An XML-RPC-based protocol that allows websites to notify each other when one links to another.	9.3%
13	XHTML Cambridge, Massachusetts, United States An XML-based markup language that extends HTML 4.	6.5%
14	Less Switzerland A backward-compatible CSS language extension inspired by Sass that supports variables, mixins, operations, and functions.	3%
15	GraphQL Menlo Park, California, United States A data query and manipulation language for APIs typically used for remote client-server communications.	1.6%
16	Prefetch Cambridge, Massachusetts, United States The rel="prefetch" attribute on HTML <link> elements tells the browser to download resources that are likely to be needed for future navigation when the current page is idle.	1.5%
17	OpenSearch Seattle, Washington, United States A specification that describes a website's search engine, enabling browsers, apps, and services to discover and integrate it.	1.3%
18	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.	1.1%
19	RDF Cambridge, Massachusetts, United States A W3C standard model for describing and exchanging graph-based data on the web.	1%
20	XML Cambridge, Massachusetts, United States A markup language and file format for storing, transmitting, and reconstructing structured data in a platform-independent way.	1%
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	Sass A stylesheet language that compiles to CSS and allows developers to use variables, nested rules, mixins, and functions.	0.8%
23	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%
24	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.	0.6%
25	Sitemap A specialized XML file that lists a website's URLs and helps search engines discover pages available for crawling and indexing.	0.5%

👉 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 43,871 websites from the Czech Republic.
We currently track the presence of 54 standards across the web.
Of these, 50 were detected on websites from the Czech Republic.
Statistics were last calculated on September 18, 2026.
For more details, see our methodology and disclaimer.