⚡ Semantic Markup in the Czech Republic

Semantic markup is code added to web pages to describe the meaning of content elements and their relationships, giving search engines and other systems clearer context beyond visual layout.

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

According to our research, semantic markup technologies are used on 68.2% of websites from the Czech Republic.

⭐ Most Popular in 2026

The following chart shows the top semantic markup technologies in the Czech Republic in 2026, based on market share.

The most popular is ARIA with an impressive share of 82.7%, followed by Open Graph with 67.3% and JSON-LD with 37.4%.

🚀 Highlights

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

✨ Best Semantic Markup Technologies

Below is a more detailed list of 13 semantic markup technologies used on sites from the Czech Republic, ranked by their market share.

RankNameMarket share
1
ARIA
Cambridge, Massachusetts, United States

A W3C technical specification that defines how to improve the accessibility of web content and applications, particularly those with dynamic interfaces and custom controls.
2
Open Graph
Menlo Park, California, United States

Enables any web page to become a rich object in a social graph.
3
JSON-LD
Cambridge, Massachusetts, United States

A lightweight linked data format used to embed structured data into web pages.
4
Twitter Cards
Bastrop, Texas, United States

With Twitter Cards, you can attach rich photos, videos and media experiences to tweets, helping to drive traffic to your website.
5
oEmbed

A format for allowing an embedded representation of a URL on third party sites.
6
SearchAction
Cambridge, Massachusetts, United States

A structured data type from Schema.org that describes a website's search capability.
7
Microdata
Cambridge, Massachusetts, United States

An HTML specification that is used to nest metadata within a document, in parallel with the existing content.
8
Dublin Core

A metadata element set used for documents and other objects.
9
Microformats

A set of defined HTML classes and attributes created to serve as descriptive metadata about an element, representing commonly published things like people, events, blog posts, reviews, and so on.
10
RDFa
Cambridge, Massachusetts, United States

An extension to HTML5 that adds attributes to markup things like people, places, events, recipes, and reviews.
11
Microformats2

A set of defined HTML classes and attributes created to serve as descriptive metadata about an element, representing commonly published things like people, events, blog posts, reviews, and so on.
12
GoodRelations

A standardized vocabulary for product, price, store, and company data that can be embedded into web pages.
13
Product Ontology

The Product Types Ontology provides 300,000 definitions for types of product or services that extend the schema.org and GoodRelations standards for e-commerce markup.

👉 See Also

Data is based on the analysis of 36,165 websites from the Czech Republic.
Statistics were last calculated on .
For details, see our methodology and disclaimer.