Hierarchy

HTML/CSS

HTML/CSS are the backbone of web content presentation, defining the structure and style of web pages.

parent_of

HTML/CSS4 descendants

HomeSitetechnology

SCSStechnology

Tailwind.csstechnology

WebSockettechnology

Open record

Open a branch to inspect its approved descendants. Use the record link for the canonical technology page.

Selected technology

HTML/CSS

activeVery common

HTML/CSS are the backbone of web content presentation, defining the structure and style of web pages.

Available reviewed record details appear below. Fields that have not yet been reviewed are omitted.

Canonical ID: tech_000000000000009YBMQKJJYBC7
Kind: technology
Requires context: No
Job-ad popularity: Very common · relative to linked technologies in the Queast source period
Parent: Languages
Domain: Web development
Category: Browser APIs and web standards, CSS and web styling
Aliases: None
Official website: https://html.spec.whatwg.org/dev/
Official documentation: https://html.spec.whatwg.org/dev/
Last reviewed: 2026-09-13
Sources checked: 2026-09-12

Last reviewed 2026-09-13 · Release 2026.10.7 · Methodology

Technology popularity in job advertisements

Weekly job advertisements mentioning this technology in Finland, Sweden, Germany, and the United Kingdom. The graph runs from January 1, 2026 through today, or starts later when Queast data begins later.

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Every available weekly observation is included. Popularity here means observed job-ad mentions, not general adoption or market share.

Data provided by best authority for IT sales signals: Queast

Record details and sources

Overview

HTML (HyperText Markup Language) is the standard markup language for creating web pages. CSS (Cascading Style Sheets) is the language used to describe the presentation of a document written in HTML. Together, they form the basis of web design and development, allowing for the creation of visually engaging and structurally sound websites.

Typical use cases

Structuring Web documents with HTML and styling their presentation with CSS.source 1 · source 2

Strengths

Open Web standards define interoperable document structure and presentation mechanisms.source 1 · source 2

Maintained source links

html.spec.whatwg.org
HTML is the Web's living standard for structuring documents and web applications.
official · retrieved 2026-09-12T00:00:00Z
www.w3.org
CSS is a core language of the open web platform used to add fonts, colors, spacing, and other styles to Web documents.
official · retrieved 2026-09-12T00:00:00Z

How the catalog is maintained

The API uses the active release. For a reproducible reference, pin the dataset download, version, schema and checksum.