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<!DOCTYPE html> <html class="no-js" lang="en" dir="ltr" prefix="og: http://ogp.me/ns#"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <script> document.documentElement.className = document.documentElement.className.replace('no-js', 'has-js'); function downloadJSAtOnload() { var element = document.createElement("script"); element.src = "/WAI/assets/scripts/main.js?1732321439590790613"; document.body.appendChild(element); } window.addEventListener("load", downloadJSAtOnload, false); </script> <link rel="stylesheet" href="/WAI/assets/css/style.css?1732321439590790613"> <title> Images Tutorial | Web Accessibility Initiative (WAI) | W3C</title> <meta name="generator" content="Jekyll v4.3.3" /> <meta property="og:title" content="Images Tutorial" /> <meta name="author" content="W3C Web Accessibility Initiative (WAI)" /> <meta property="og:locale" content="en" /> <meta 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Develop</span></a></li><li><a lang="en" href="/WAI/test-evaluate/"><span>Test & Evaluate</span></a></li><li><a lang="en" href="/WAI/teach-advocate/"><span>Teach & Advocate</span></a></li><li><a lang="en" href="/WAI/standards-guidelines/"><span>Standards/<wbr>Guidelines</span></a></li></ul></nav><nav class="default-grid breadcrumb" aria-label="Breadcrumb" lang="en"> <ul style="align-self: center;"> <li><a href="/WAI/" lang="en">Home</a></li><li><a lang="en" href="/WAI/design-develop/"><span>Design & Develop</span></a></li><li><a lang="en" href="/WAI/tutorials/"><span>Tutorials</span></a></li><li><a lang="en" href="/WAI/tutorials/images/" aria-current="page"><span>Images</span></a></li></ul> </nav> <div class="default-grid with-gap leftcol"> <div class="sidenav"><nav class="sn-contents" aria-label="Secondary"> <ul class="sidenav--list"> <li> <a lang="en" href="/WAI/design-develop/" class="page-link"><span>Design & Develop</span></a></li><li> <a lang="en" href="/WAI/tips/writing/" class="page-link"><span>Tips for Writing</span></a></li><li> <a lang="en" href="/WAI/tips/designing/" class="page-link"><span>Tips for Designing</span></a></li><li> <a lang="en" href="/WAI/tips/developing/" class="page-link"><span>Tips for Developing</span></a></li><li> <a lang="en" href="/WAI/media/av/" class="page-link"><span>Audio & Video Media</span></a><ul><li> <a lang="en" href="/WAI/media/av/users-orgs/" class="page-link"><span>User Needs</span></a></li><li> <a lang="en" href="/WAI/media/av/planning/" class="page-link"><span>Planning</span></a></li><li> <a lang="en" href="/WAI/media/av/av-content/" class="page-link"><span>Audio Content & Video Content</span></a></li><li> <a lang="en" href="/WAI/media/av/description/" class="page-link"><span>Description</span></a></li><li> <a lang="en" href="/WAI/media/av/captions/" class="page-link"><span>Captions/Subtitles</span></a></li><li> <a lang="en" href="/WAI/media/av/transcripts/" class="page-link"><span>Transcripts</span></a></li><li> <a lang="en" href="/WAI/media/av/transcribing/" class="page-link"><span>Transcribing Audio to Text</span></a></li><li> <a lang="en" href="/WAI/media/av/sign-languages/" class="page-link"><span>Sign Languages</span></a></li><li> <a lang="en" href="/WAI/media/av/player/" class="page-link"><span>Media Player</span></a></li></ul></li><li> <a lang="en" href="/WAI/tutorials/" aria-current="location" class="page-link"><span>Tutorials</span></a><ul><li> <a lang="en" href="/WAI/tutorials/page-structure/" class="page-link"><span>Page Structure</span></a><ul><li> <a lang="en" href="/WAI/tutorials/page-structure/regions/" class="page-link"><span>Page Regions</span></a></li><li> <a lang="en" href="/WAI/tutorials/page-structure/labels/" class="page-link"><span>Labeling Regions</span></a></li><li> <a lang="en" href="/WAI/tutorials/page-structure/headings/" class="page-link"><span>Headings</span></a></li><li> <a lang="en" href="/WAI/tutorials/page-structure/content/" class="page-link"><span>Content Structure</span></a></li><li> <a lang="en" href="/WAI/tutorials/page-structure/example/" class="page-link"><span>Full Example</span></a></li></ul></li><li> <a lang="en" href="/WAI/tutorials/menus/" class="page-link"><span>Menus</span></a><ul><li> <a lang="en" href="/WAI/tutorials/menus/structure/" class="page-link"><span>Structure</span></a></li><li> <a lang="en" href="/WAI/tutorials/menus/styling/" class="page-link"><span>Styling</span></a></li><li> <a lang="en" href="/WAI/tutorials/menus/flyout/" class="page-link"><span>Fly-Out Menus</span></a></li><li> <a lang="en" href="/WAI/tutorials/menus/application-menus/" class="page-link"><span>Application Menus</span></a></li><li> <a lang="en" href="/WAI/tutorials/menus/application-menus-code/" class="page-link"><span>Application Menu Example & Code</span></a></li></ul></li> <li> <a lang="en" href="/WAI/tutorials/images/" aria-current="page" class="page-link"><span>Images</span></a><ul><li> <a lang="en" href="/WAI/tutorials/images/informative/" class="page-link"><span>Informative Images</span></a></li><li> <a lang="en" href="/WAI/tutorials/images/decorative/" class="page-link"><span>Decorative Images</span></a></li><li> <a lang="en" href="/WAI/tutorials/images/functional/" class="page-link"><span>Functional Images</span></a></li><li> <a lang="en" href="/WAI/tutorials/images/textual/" class="page-link"><span>Images of Text</span></a></li><li> <a lang="en" href="/WAI/tutorials/images/complex/" class="page-link"><span>Complex Images</span></a></li><li> <a lang="en" href="/WAI/tutorials/images/groups/" class="page-link"><span>Groups of Images</span></a></li><li> <a lang="en" href="/WAI/tutorials/images/imagemap/" class="page-link"><span>Image Maps</span></a></li><li> <a lang="en" href="/WAI/tutorials/images/decision-tree/" class="page-link"><span>An <code style="color: inherit;">alt</code> Decision Tree</span></a></li><li> <a lang="en" href="/WAI/tutorials/images/tips/" class="page-link"><span>Tips and Tricks</span></a></li></ul></li><li> <a lang="en" href="/WAI/tutorials/tables/" class="page-link"><span>Tables</span></a><ul><li> <a lang="en" href="/WAI/tutorials/tables/one-header/" class="page-link"><span>One Header</span></a></li><li> <a lang="en" href="/WAI/tutorials/tables/two-headers/" class="page-link"><span>Two Headers</span></a></li><li> <a lang="en" href="/WAI/tutorials/tables/irregular/" class="page-link"><span>Irregular Headers</span></a></li><li> <a lang="en" href="/WAI/tutorials/tables/multi-level/" class="page-link"><span>Multi-level Headers</span></a></li><li> <a lang="en" href="/WAI/tutorials/tables/caption-summary/" class="page-link"><span>Caption & Summary</span></a></li><li> <a lang="en" href="/WAI/tutorials/tables/tips/" class="page-link"><span>Tips and Tricks</span></a></li></ul></li><li> <a lang="en" href="/WAI/tutorials/forms/" class="page-link"><span>Forms</span></a><ul><li> <a lang="en" href="/WAI/tutorials/forms/labels/" class="page-link"><span>Labeling Controls</span></a></li><li> <a lang="en" href="/WAI/tutorials/forms/grouping/" class="page-link"><span>Grouping Controls</span></a></li><li> <a lang="en" href="/WAI/tutorials/forms/instructions/" class="page-link"><span>Form Instructions</span></a></li><li> <a lang="en" href="/WAI/tutorials/forms/validation/" class="page-link"><span>Validating Input</span></a></li><li> <a lang="en" href="/WAI/tutorials/forms/notifications/" class="page-link"><span>User Notifications</span></a></li><li> <a lang="en" href="/WAI/tutorials/forms/multi-page/" class="page-link"><span>Multi-page Forms</span></a></li><li> <a lang="en" href="/WAI/tutorials/forms/custom-controls/" class="page-link"><span>Custom Controls</span></a></li></ul></li><li> <a lang="en" href="/WAI/tutorials/carousels/" class="page-link"><span>Carousels</span></a><ul><li> <a lang="en" href="/WAI/tutorials/carousels/structure/" class="page-link"><span>Structure</span></a></li><li> <a lang="en" href="/WAI/tutorials/carousels/functionality/" class="page-link"><span>Functionality</span></a></li><li> <a lang="en" href="/WAI/tutorials/carousels/animations/" class="page-link"><span>Animations</span></a></li><li> <a lang="en" href="/WAI/tutorials/carousels/styling/" class="page-link"><span>Styling</span></a></li><li> <a lang="en" href="/WAI/tutorials/carousels/working-example/" class="page-link"><span>Working Example</span></a></li><li> <a lang="en" href="/WAI/tutorials/carousels/full-code/" class="page-link"><span>Complete Code</span></a></li></ul></li></ul></li></ul></nav> </div> <main id="main" lang="en"> <header class="in-resource"> <h1> Images Tutorial </h1><p>in <a lang="en" href="/WAI/tutorials/"><span>Tutorials</span></a></p></header> <p>Images must have text alternatives that describe the information or function represented by them. This ensures that images can be used by <a href="#why-is-this-important">people with various disabilities</a>. This tutorial demonstrates how to provide appropriate text alternatives based on the purpose of the image:</p> <ul> <li> <p><strong><a href="/WAI/tutorials/images/informative/">Informative images</a></strong>: Images that graphically represent concepts and information, typically pictures, photos, and illustrations. The text alternative should be at least a short description conveying the essential information presented by the image.</p> </li> <li> <p><strong><a href="/WAI/tutorials/images/decorative/">Decorative images</a></strong>: Provide a null text alternative (<code class="language-plaintext highlighter-rouge">alt=""</code>) when the only purpose of an image is to add visual decoration to the page, rather than to convey information that is important to understanding the page.</p> </li> <li> <p><strong><a href="/WAI/tutorials/images/functional/">Functional images</a></strong>: The text alternative of an image used as a link or as a button should describe the functionality of the link or button rather than the visual image. Examples of such images are a printer icon to represent the print function or a button to submit a form.</p> </li> <li> <p><strong><a href="/WAI/tutorials/images/textual/">Images of text</a></strong>: Readable text is sometimes presented within an image. If the image is not a logo, avoid text in images. However, if images of text are used, the text alternative should contain the same words as in the image.</p> </li> <li> <p><strong><a href="/WAI/tutorials/images/complex/">Complex images</a></strong> such as graphs and diagrams: To convey data or detailed information, provide a complete text equivalent of the data or information provided in the image as the text alternative.</p> </li> <li> <p><strong><a href="/WAI/tutorials/images/groups/">Groups of images</a></strong>: If multiple images convey a single piece of information, the text alternative for one image should convey the information for the entire group.</p> </li> <li> <p><strong><a href="/WAI/tutorials/images/imagemap/">Image maps</a></strong>: The text alternative for an image that contains multiple clickable areas should provide an overall context for the set of links. Also, each individually clickable area should have alternative text that describes the purpose or destination of the link.</p> </li> </ul> <p>For a quick overview on deciding which category a particular image fits into, see the <a href="/WAI/tutorials/images/decision-tree/"><code class="language-plaintext highlighter-rouge">alt</code> Decision Tree</a>. The text alternative needs to be determined by the author, depending on the usage, context, and content of an image. For example, the exact type and look of a bird in an image might be less relevant and described only briefly on a website about parks, but may be appropriate on a website specifically about birds.</p> <h2 id="why-is-this-important">Why is this important?</h2> <p>Images and graphics make content more pleasant and easier to understand for many people, and in particular for those with cognitive and learning disabilities. They serve as cues that are used by people with visual impairments, including people with low vision, to orient themselves in the content.</p> <p>However, images are used extensively on websites and can create major barriers when they are not accessible. Accessible images are beneficial in many situations, such as:</p> <ul> <li><strong>People using screen readers:</strong> The text alternative can be read aloud or rendered as Braille</li> <li><strong>People using speech input software:</strong> Users can put the focus onto a button or linked image with a single voice command</li> <li><strong>People browsing speech-enabled websites:</strong> The text alternative can be read aloud</li> <li><strong>Mobile web users:</strong> Images can be turned off, especially for data-roaming</li> <li><strong>Search engine optimization:</strong> Images become indexable by search engines</li> </ul> <aside class="box box-simple"><header class="box-h box-h-simple"> Note</header><div class="box-i"> <p>Removing images from websites (so-called “text-only versions”) make them less accessible and functional for these users and situations.</p> </div></aside> <aside class="box box-large box-icon" id="related"><header class="box-h box-h-large box-h-icon box-h-icon"> <svg focusable="false" aria-hidden="true" class="icon-default "><use xlink:href="/WAI/assets/images/icons.svg#icon-default"></use></svg> Related WCAG resources</header><div class="box-i"> <p>These tutorials provide best-practice guidance on implementing accessibility in different situations. This page combined the following WCAG success criteria and techniques from different conformance levels:</p> <p><strong>Success Criteria:</strong></p> <ul><li><a href="https://www.w3.org/WAI/WCAG21/quickref/#qr-text-equiv-all"><strong>1.1.1</strong> Non-text Content:</a> All non-text content that is presented to the user has a text alternative that serves the equivalent purpose, except for the situations listed[…]. (Level A)</li><li><a href="https://www.w3.org/WAI/WCAG21/quickref/#qr-visual-audio-contrast-text-presentation"><strong>1.4.5</strong> Images of Text:</a> If the technologies being used can achieve the visual presentation, text is used to convey information rather than images of text except [for customizable and essential images] (Level AA)</li><li><a href="https://www.w3.org/WAI/WCAG21/quickref/#qr-visual-audio-contrast-text-images"><strong>1.4.9</strong> Images of Text (No Exception):</a> Images of text are only used for pure decoration or where a particular presentation of text is essential to the information being conveyed (Level AAA)</li></ul> </div></aside> <nav class="pager" aria-label="Previous/Next Page" style="clear: both;"> <ul><li class="pager--item next"> <a href="/WAI/tutorials/images/informative/"> <svg focusable="false" aria-hidden="true" class="icon-arrow-right pager--item-icon"><use xlink:href="/WAI/assets/images/icons.svg#icon-arrow-right"></use></svg> <span class="pager--item-text"> <span class="pager--item-text-direction">Next:</span> <span class="pager--item-text-target">Informative Images</span> </span> </a> </li> </ul></nav><aside class="box box-icon box-space-above" id="helpimprove" aria-label="feedback"><header class="box-h box-h-icon box-h-space-above box-h-icon"> <svg focusable="false" aria-hidden="true" class="icon-comments "><use xlink:href="/WAI/assets/images/icons.svg#icon-comments"></use></svg> <h2> Help improve this page </h2></header><div class="box-i"><p>Please share your ideas, suggestions, or comments via e-mail to the publicly-archived list <a href="mailto:wai@w3.org?body=%5Binclude%20a%20relevant%20email%20Subject%5D%0A%0A%5Bput%20comment%20here...%5D%0A%0AI%20give%20permission%20to%20share%20this%20to%20a%20publicly-archived%20e-mail%20list.">wai@w3.org</a> or via GitHub.</p> <div class="button-group"> <a href="mailto:wai@w3.org?body=%5Binclude%20a%20relevant%20email%20Subject%5D%0A%0A%5Bput%20comment%20here...%5D%0A%0AI%20give%20permission%20to%20share%20this%20to%20a%20publicly-archived%20e-mail%20list." class="button"><span>E-mail</span></a><a href=" https://github.com/w3c/wai-website/edit/main/pages/design-develop/tutorials/images/index.md " class="button"><span>Fork & Edit on GitHub</span></a><a href="https://github.com/w3c/wai-website/issues/new?template=content-issue.yml&wai-resource-id=wai-tutorials&wai-url=https://www.w3.org/WAI/tutorials/images/" class="button"><span>New GitHub Issue</span></a></div></div></aside> <a class="button button-backtotop" href="#top"><span><svg focusable="false" aria-hidden="true" class="icon-arrow-up "><use xlink:href="/WAI/assets/images/icons.svg#icon-arrow-up"></use></svg> Back to Top</span></a> </main> </div> <footer id="wai-site-footer" class="page-footer default-grid" aria-label="Page"> <div class="inner"> <div><strong>Status:</strong> Updated 08 February 2022 </div> <div> Editors: <ul class="sentence"> <li><a href="https://www.w3.org/People/yatil/">Eric Eggert</a></li> <li><a href="https://www.w3.org/People/shadi/">Shadi Abou-Zahra</a></li> </ul>   Update Editor: <ul class="sentence"> <li>Brian Elton</li> </ul>   Contributors: <ul class="sentence"> <li>see <a href="/WAI/tutorials/acknowledgements/">Acknowledgements</a></li> </ul> </div> <p>Developed by the Education and Outreach Working Group (<a href="https://www.w3.org/groups/wg/eowg">EOWG</a>). 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