Apply practical universal design approaches, including semantic HTML, to make websites and apps accessible.
CSS Protips
Improve CSS code with this collection of tips covering practices for writing stylesheets.

About CSS Protips
CSS Protips is an open source repository of tips for writing CSS stylesheets. It provides short explanations with code examples for practices including resets, box-sizing inheritance, selectors such as :not() and :is(), focus styling for form elements, vertical centering with flexbox and grid, and text sizing with rem, em and line-height. The repository includes translations, contribution guidelines and a code of conduct.
Key features
- Code examples for CSS reset and box-sizing inheritance
- Tips for :not(), :is(), nth-child and attribute selectors
- Guidance on :focus styling for form elements
- Methods to vertically center with flexbox and grid
- Techniques for rem/em sizing and line-height inheritance
- Examples for styling broken images and empty elements
- Open source repository that includes translations
- Each tip includes code examples, with demos for many entries
- Covers practical topics such as focus styles, resets and selectors
CSS Protips at a glance
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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