A decade of Canvas at your command — powered by our custom AI engineStart Building →

Image Alt Text Generator

The Image Alt Text Generator creates semantic, accessible HTML image markup with properly structured alt text attributes, ARIA labels, and optional captions. It outputs production-ready Bootstrap 5 code for developers who need WCAG 2.1-compliant image components without hand-writing repetitive accessibility markup.

Configuration

Content

Image URL

Alt Text Description

Image Role

Link URL (if role is Linked)

Show Figure Caption

Caption Text

Title Attribute (tooltip on hover)

Design

Display Style

Box Shadow

Accent / Caption Color

Border Radius (px)

Layout

Max Width

Alignment

Enable Lazy LoadingShow Accessibility Badge

How to Use

1. Configure your image source URL, alt text description, and optional caption text in the Content section. 2. Adjust the display style, border-radius, shadow, and accent color to match your design system. 3. Preview the rendered Bootstrap 5 image component with all accessibility attributes applied. 4. Copy the HTML output and drop it directly into your project — no additional CSS or JS required.

Why Use This Tool?

Writing correct alt text markup by hand — including figcaption, role attributes, and decorative image handling — takes time and is easy to get wrong under WCAG 2.1 success criterion 1.1.1. This tool enforces correct patterns automatically, so you get compliant output in seconds rather than looking up spec examples. It requires zero dependencies beyond Bootstrap 5, which most projects already include.

Frequently Asked Questions

What is the Image Alt Text Generator?

It's a free tool that generates accessible, WCAG 2.1-compliant Bootstrap 5 HTML image markup — including alt attributes, figcaption, ARIA roles, and decorative image handling — based on your configuration inputs.

When should I use an empty alt attribute vs. descriptive alt text?

Use an empty alt attribute (alt="") for purely decorative images that add no informational value — screen readers will skip them entirely. Use descriptive alt text for images that convey meaning, show data, or serve as links. The WCAG 2.1 rule is: if removing the image would cause a user to lose information, the image needs descriptive alt text. This tool supports both patterns via the 'Image Role' select field — choose 'Decorative' to output alt="" automatically.

Is it free?

Yes — the Image Alt Text Generator is completely free with no signup required. Built by the CanvasBuilder.co team.