⚡ Standards in Vietnam

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

Vietnam is a Southeast Asian country with a population of over 99 million people.

According to our statistics, standards are used on 95.2% of websites from Vietnam.

⭐ Most Popular in 2026

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

The most popular is CSS with an impressive share of 97.1%, followed by HTML with 92.4% and Open Graph with 75.9%.

CSS 97.1%
HTML 92.4%
Open Graph 75.9%
SearchAction 46.2%
RSD 40.2%
DNS Prefetch 39.2%
JSON 36.9%
XFN 35.3%
Pingback 28.3%
Preconnect 20.8%
Preload 18.6%
Prefetch 14%
Speculation Rules 12%
XHTML 6.9%
Sass 3.2%

🚀 Highlights

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

4. SearchAction ^(-3)
8. XFN ^(-2)
9. Pingback ^(-3)
12. Prefetch ^(-5)
15. Sass ^(-7)
17. CGI ^(-6)
18. OpenID ^(-6)
20. Less ^(-5)
24. Sitemap ^(-2)
25. Text ^(-2)

✨ Top Web Standards

Below is a more detailed list of the top 25 of the 42 standards used on sites from Vietnam, 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.	97.1%
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.	92.4%
3	Open Graph Menlo Park, California, United States Enables any web page to become a rich object in a social graph.	75.9%
4	SearchAction Cambridge, Massachusetts, United States A structured data type from Schema.org that describes a website's search capability.	46.2%
5	RSD An XML format that helps client software find the services needed to read, edit, or "work with" weblogging software.	40.2%
6	DNS Prefetch Cambridge, Massachusetts, United States The rel="dns-prefetch" attribute on HTML elements.	39.2%
7	JSON A lightweight, language-independent data exchange format derived from JavaScript and used to structure and transmit data between systems.	36.9%
8	XFN An HTML microformat that provides a simple way to represent human relationships using links.	35.3%
9	Pingback A method for web authors to request notification when somebody links to one of their documents.	28.3%
10	Preconnect Cambridge, Massachusetts, United States The rel="preconnect" attribute on HTML elements.	20.8%
11	Preload Cambridge, Massachusetts, United States The rel="preload" attribute on HTML elements.	18.6%
12	Prefetch Cambridge, Massachusetts, United States The rel="prefetch" attribute on HTML elements.	14%
13	Speculation Rules Mountain View, California, United States API is used to improve navigation performance by prefetching or even prerendering future navigations.	12%
14	XHTML Cambridge, Massachusetts, United States An XML-based markup language that extends HTML 4.	6.9%
15	Sass A stylesheet language that compiles to CSS and allows developers to use variables, nested rules, mixins, and functions.	3.2%
16	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.	1.6%
17	CGI Wilmington, Delaware, United States An interface specification that enables web servers to execute an external program to process HTTP requests.	1.6%
18	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.	1.3%
19	OpenSearch Seattle, Washington, United States A specification that describes a website's search engine, enabling browsers, apps, and services to discover and integrate it.	0.8%
20	Less A backward-compatible CSS language extension inspired by Sass that supports variables, mixins, operations, and functions.	0.7%
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.	0.6%
22	YAML A data serialization language designed to be human friendly and work well with modern programming languages for common everyday tasks.	0.4%
23	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.	0.4%
24	Sitemap A file in XML format that allows webmasters to inform search engines about URLs on a website that are available for web crawling.	0.3%
25	Text Cambridge, Massachusetts, United States The plain text document format.	0.2%

👉 See Also

🌎 Standards in other countries

Data is based on the analysis of 25,590 websites from Vietnam.
Statistics were last calculated on March 21, 2026.
For details, see our methodology and disclaimer.