Using Gemini as Accessibility Checker

Unlike standard checkers that just scan code, Gemini’s multimodal nature (its ability to “see” images and “read” code simultaneously) makes it a powerful partner for accessibility. While using Gemini as an accessibility checker won’t guarantee WCAG 2.1 compliance, it can dramatically improve how you approach accessibility.

1. The Multimodal Advantage: “Seeing” Your UI

Traditional automated tools can tell you if an <img> tag is missing an alt attribute. Gemini goes further: it can look at a screenshot of your page and tell you if the alt text actually describes what is happening.

How to use it: Upload a screenshot of a complex component (like a data dashboard or a hero banner) and use a prompt like:

“Analyze this UI screenshot against WCAG 2.1 SC 1.1.1 (Non-text Content). Does the visual information provided here require specific alt text descriptions that aren't obvious from the text alone?”

2. Analyzing Code for “Operable” Guidelines

WCAG 2.1 Level AA requires that all functionality be “Operable” via a keyboard (Guideline 2.1). Gemini can perform static analysis on your React, HTML, or Vue components to spot focus traps or missing ARIA labels.

How to use it:

“I am sharing a navigation component code snippet. Check it against WCAG 2.1 Level AA standards. Specifically, look for:

1. Correct use of ARIA roles.

2. Logical tab order.

3. Visible focus indicators.
   Suggest fixes for any issues found.”

3. Simplifying “Understandable” Content

Guideline 3.1 of WCAG 2.1 focuses on making text content readable and understandable. Gemini excels at “Plain Language” processing.

How to use it: Paste your website’s copy into Gemini and ask:

“Rewrite this technical documentation to meet WCAG 2.1 Level AA 'Understandable' criteria. Aim for a lower secondary education reading level (SC 3.1.5) without losing the core meaning.”

4. Checking Color Contrast (Vision)

While there are many contrast checkers, Gemini can analyze a design mockup before it’s coded.

How to use it:

“Look at this mockup. Identify areas where text contrast might fail the 4.5:1 ratio for standard text (WCAG 1.4.3). Focus specifically on the ghost buttons and the footer text.”

5. Simulate User Perspectives

Accessibility is more than just technical; it’s experiential. Gemini can help simulate how different users might interact with content. This aligns with a broader shift in accessibility: moving from compliance to understanding and usability.

How to use it:

• “How might a screen reader user experience this page?”

• “What cognitive accessibility issues might this interface create?”

6. Drafting Your Accessibility Statement

Once your checks are done, Gemini can help you communicate your commitment by drafting a Voluntary Product Accessibility Template (VPAT) or an Accessibility Statement based on your audit results.

Quick Start: Gemini Accessibility Prompts