Guidelines of WCAG 2.0 AA and UCSF Accessibility Guide

Use the UCSF guide pages to understand and get help making accessible websites and other digital communications.

A singing introduction to WCAG. 

At the Heart of it, are the 4 Principles and 12 Guidelines of WCAG 2.0

Our content should engage WCAG 2.0’s 4 Principles and 12 Guidelines, commonly referred to by the acronym “POUR:” Perceivable, Operable, Understandable, Robust:” Although these are designed for the web - the ideas can apply to all digital documents so they are referred to often.

Are you ready to go directly to using WCAG to achieve accessibility compliance? Use the How to Meet WCAG 2.0 power tool. It gets a little deep but use the filters, accordions, and check boxes to set your view.


Information and user interface components must be presentable to users in ways they can perceive.

Guideline 1.1: Provide text alternatives for any non-text content so that it can be changed into other forms people need, such as large print, braille, speech, symbols or simpler language.

Guideline 1.2: Time-based Media: Provide alternatives for time-based media.

Guideline 1.3: Create content that can be presented in different ways (for example simpler layout) without losing information or structure.

Guideline 1.4: Make it easier for users to see and hear content including separating foreground from background.


User interface components and navigation must be operable.

Guideline 2.1: Make all functionality available from a keyboard.

Guideline 2.2: Provide users enough time to read and use the content.

Guideline 2.3: Do not design content in a way that is known to cause seizures.

Guideline 2.4: Provide ways to help users navigate, find content, and determine where they are.


Information and the operation of user interface must be understandable.

Guideline 3.1: Make text content readable and understandable.

Guideline 3.2: Make web pages appear and operate in predictable ways.

Guideline 3.3: Help users avoid and correct mistakes.


Content must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies.

Guideline 4.1: Maximize compatibility with current and future user agents, including assistive technologies.