What Is an HTML Class and ID?

In HTML, class and id attributes are used to uniquely identify elements for styling, scripting and layout purposes. Classes may be reused multiple times, while IDs must remain unique within a document.

Why Developers Extract Classes and IDs

Create CSS files for existing HTML
Clean unused styles
Build design systems
Analyze third-party templates
Debug broken layouts

Difference Between Class and ID

Class: reusable selector (.container)
ID: unique selector (#header)

CSS Skeleton Generator Explained

The generated CSS skeleton creates empty selector blocks automatically, saving developers time and ensuring consistent formatting when starting new stylesheets.

Supports Complex HTML Structures

The extractor correctly handles nested elements, multiple classes per element and irregular spacing inside class attributes.

Example

HTML: <div class="container main"></div>

Output: .container .main

Who Uses This Tool?

Frontend developers
UI/UX designers
Students
Theme developers
Website auditors

Client-Side Processing & Privacy

All HTML scanning happens locally inside your browser. No HTML code is uploaded, stored or shared with any server.

Frequently Asked Questions

Is class and ID extractor free?
Yes, unlimited usage is completely free.

Are files uploaded?
Never. Everything runs locally.

Can I extract from large HTML files?
Yes, thousands of lines supported.

Does it support React or Angular HTML?
Yes, static markup is supported.

Extract HTML Class and ID Online

Find all CSS class and ID selectors from HTML code instantly