How to Add Alt Text to Images: Web Accessibility Guide

Why Alt Text Matters for Your Small Business Website

Alt text, or alternative text, is the written description of an image that displays when the image fails to load or when screen readers interpret your website for visually impaired users. For small business owners, alt text serves a dual purpose: it's both an accessibility requirement under the Web Content Accessibility Guidelines (WCAG) and a valuable SEO tool that helps search engines understand your visual content.

Without proper alt text, you're missing out on two critical opportunities. First, you're excluding potential customers who rely on assistive technologies to browse the web. Second, you're leaving SEO performance on the table. Search engines can't "see" images the way humans do—they rely entirely on alt text to understand what an image depicts and how it relates to your content.

The legal landscape is shifting too. More small businesses are facing accessibility lawsuits, with the Americans with Disabilities Act (ADA) increasingly interpreted to include digital accessibility. Adding comprehensive alt text isn't just good practice; it's becoming a business necessity.

The Anatomy of Effective Alt Text

Writing alt text isn't about creating lengthy descriptions. It's about being concise, descriptive, and contextually relevant. Effective alt text typically ranges from 8 to 125 characters and should describe the image in a way that makes sense to someone who can't see it.

Start by asking yourself: "What information does this image convey?" If it's a product photo, describe the product clearly. If it's a decorative element, you might use empty alt text (alt=""). If it's a graph or chart, summarize the key data point rather than just saying "chart."

Avoid common mistakes like starting with "image of" or "picture of"—screen readers already announce that an element is an image. Instead, jump straight to the description. Also avoid keyword stuffing. While including relevant keywords naturally is fine, alt text exists for accessibility first and SEO second.

How to Add Alt Text Across Different Platforms

The process for adding alt text varies slightly depending on your website platform. If you're using WordPress, edit the image in the media library and fill in the "Alt Text" field. Most modern page builders like Elementor, Divi, or Wix have dedicated alt text fields in their image settings.

For e-commerce platforms like Shopify, navigate to your product images and input alt text in the image alt field. If you're using a CMS like HubSpot or Webflow, there's typically an accessibility panel where you can add alt text alongside the image.

If you've already published content without alt text, don't panic. Conduct an audit of your site, prioritizing high-traffic pages and product images. Many tools like WAVE or Axe DevTools can scan your site and identify missing alt text automatically.

Alt Text Best Practices for Common Image Types

Product Images: "Blue ceramic coffee mug with white interior, 12oz capacity" beats "coffee mug." Include color, size, and key features relevant to customers.

Team Photos: "Sarah Johnson, NYC-based web designer, smiling in office setting" is more descriptive than "team member."

Infographics: Summarize the main insight. For example, "73% of small businesses report improved website traffic after implementing SEO strategies" rather than just "infographic."

Decorative Images: Use empty alt text (alt="") so screen readers skip over purely decorative elements. This keeps the experience clean for accessibility users.

Screenshots: Describe what the screenshot shows and its purpose. Example: "Screenshot of Google Analytics dashboard showing monthly traffic increase from January to March 2024."

Moving Forward with Your Accessibility Strategy

Adding alt text is just one component of web accessibility, but it's one of the most impactful steps you can take as a small business owner. When you prioritize accessibility, you're creating a more inclusive web experience, improving your SEO, and reducing legal risk—all while demonstrating that your business values all customers.

Make alt text a standard part of your content workflow. Train your team, audit existing content quarterly, and stay updated on accessibility best practices. Your website visitors—and your business—will thank you.