Troy Chaplin

mikecorkum

<a href="https://blockaccessibilitychecks.com/" rel="nofollow ugc">Block Accessibility Checks</a> is a comprehensive WordPress plugin that proactively prevents accessibility issues in your content before they reach your audience. Designed for the Gutenberg block editor, it provides real-time validation with a three-tier system that ensures your blocks, post meta fields, and overall document structure meet WCAG (Web Content Accessibility Guidelines) requirements.
Unlike reactive accessibility tools that scan published content, this plugin catches problems during the editing process—giving immediate visual feedback and preventing publication of content with critical accessibility errors. Content creators get clear guidance on what needs fixing, while developers can extend the system with custom checks for blocks, meta fields, and editor-level validation.
Whether you’re a content creator ensuring your posts are accessible, a developer building accessible blocks, or an organization maintaining compliance standards, Block Accessibility Checks provides the tools you need to create inclusive content effortlessly.
Features for Content Creators & Editors:
<ul>
<li>Real-time Visual Feedback – See accessibility issues instantly with color-coded borders (red for errors, yellow for warnings) around problematic blocks and detailed error messages in the block inspector panel</li>
<li>Smart Publishing Control – Critical accessibility errors prevent publishing until resolved, while warnings allow publication with user awareness</li>
<li>Comprehensive Block Coverage – Built-in validation for images, buttons, tables, headings, and galleries with clear guidance on how to fix issues</li>
<li>Document-Wide Validation – Advanced heading hierarchy checking prevents skipped heading levels and ensures proper content structure across your entire post</li>
<li>Title Validation – Ensures posts and pages have a title set for accessibility and SEO, validates in real-time as you type</li>
<li>Intelligent URL Validation – Real TLD validation using the Public Suffix List ensures only legitimate domains are accepted in button links</li>
<li>Configurable Settings – Control which checks are errors (prevent publishing), warnings (allow with notice), or disabled through an intuitive admin interface</li>
<li>Grouped Error Display – All accessibility issues shown at once in organized groups, eliminating the “fix one, see another” frustration</li>
<li>Works Everywhere – Validation runs in both the post editor and site editor (templates/template parts) with separate configurable settings</li>
</ul>
Features for Developers & Plugin Authors:
<ul>
<li>Three-Tier Validation API – Register custom checks for block attributes, post meta fields, and editor-level validation using comprehensive hooks and filters</li>
<li>JavaScript-Only Validation – All validation logic runs in JavaScript for real-time editor feedback without server round-trips</li>
<li>Automatic Settings Integration – External plugins automatically get their own settings pages under the Block Checks menu</li>
<li>External Plugin Support – Works seamlessly with custom blocks from third-party plugins and themes</li>
<li>Extensive Hook System – 20+ action and filter hooks for complete customization of registration, validation, and display behavior</li>
<li>Well-Documented API – Complete developer documentation with quick start guides and working code examples</li>
</ul>
How It Works:
The plugin provides immediate feedback as you edit content through a sophisticated three-tier validation system:
<ol>
<li>Block Validation – Validates individual block attributes in real-time as you type and edit</li>
<li>Meta Field Validation – Checks required post meta fields with automatic post locking when validation fails</li>
<li>Editor-Level Validation – Validates document-wide concerns like heading hierarchy that span across multiple blocks</li>
</ol>
When accessibility issues are detected, they are highlighted with visual indicators (red for errors, yellow for warnings) and detailed messages explain how to fix the problems. Critical errors prevent publishing until resolved, while warnings allow publication with user acknowledgment.
Built-in Accessibility Checks:
<ul>
<li>Button Blocks – Ensures buttons have descriptive text content and validates link destinations using real TLD validation (Public Suffix List)</li>
<li>Image Blocks – Requires alt text (unless marked decorative), validates alt text length (warns if exceeding 125 characters), prevents caption duplication, and detects non-descriptive patterns like “image of” or “photo123”</li>
<li>Table Blocks – Requires proper headers or captions for screen reader navigation</li>
<li>Heading Blocks – Validates proper heading hierarchy across entire document (prevents skipped levels), ensures appropriate first heading level (H2 recommended, H1 allowed with warnings), and provides configurable heading level restrictions (H1, H5, H6 can be disabled)</li>
<li>Gallery Blocks – Applies comprehensive image accessibility checks to all gallery items (alt text, length, patterns, caption duplication)</li>
<li>Post & Page Title Validation – Ensures posts and pages have a title set for accessibility and SEO, validates in real-time as users type, prevents publishing content without a title, configurable independently for posts and pages</li>
<li>Post Meta Fields – Validate required custom fields with real-time validation, automatic post locking for errors, and seamless integration with block validation system</li>
</ul>
Perfect For:
<ul>
<li>Government websites requiring WCAG compliance</li>
<li>Educational institutions with accessibility mandates</li>
<li>Businesses committed to inclusive web content</li>
<li>Developers building accessible WordPress themes and plugins</li>
<li>Content teams who want accessibility guidance built into their workflow</li>
</ul>
Developer Resources:
Extend the plugin with <a href="https://github.com/troychaplin/block-accessibility-checks/blob/main/docs/" rel="nofollow ugc">custom accessibility checks</a> using the comprehensive validation API. See the complete <a href="https://github.com/troychaplin/block-accessibility-checks/blob/main/docs/" rel="nofollow ugc">developer documentation</a> for quick start guides, API reference, code examples, and a <a href="https://github.com/troychaplin/block-check-integration-example" rel="nofollow ugc">working example plugin</a>.
<h3>Getting Involved</h3>
If you would like to get involved and contribute to the development of this plugin or view it’s source code you can find more information in the <a href="https://github.com/troychaplin/block-accessibility-checks" rel="nofollow ugc">plugins GitHub repo</a>.

Block Accessibility Checks

Prevent WCAG accessibility errors in your content with real-time validation for blocks, meta fields, and document structure.

PI Web Solution

Steve Curtis

Joseph LoPreste

This software HELPS you in the process of becoming ADA Section 508 compliant by providing:
<h3>Missing Alt Text Finder</h3>
Easily add any Missing Alt Text, Description Text or Caption Text to all of the pictures in your Media Library and the pictures that are already published on your Pages and Posts.
<h3>Contrast Ratio Checker</h3>
Provides you with a Contrast Ratio Checker to make sure everything hits the minimum requirements.
<h3>WCAG 3.0 Compliance Checklist</h3>
A interactive WCAG 3.0 Section 508 Checklist that helps you better understand your websites accessibility issues.
<h3>Automated Accessibility Audit</h3>
You can activate the A11Y auditing function and run multiple accessibility tests on your website and even get suggestions on how to fix them.
<h3>Resources</h3>
We give you some great resources in the form of links that will help you better understand web accessibility and help your website become even more inclusive.
<h3>Course Related Functionality</h3>
Access comprehensive accessibility training courses and educational materials directly within the plugin. Learn best practices, understand WCAG guidelines, and master accessibility implementation through interactive courses designed to help you and your team become accessibility experts.
While this plugin can HELP you meet compliance requirements, you are the only one that can ensure that all requirements are met.
If you find this plugin useful, please rate and review it. If you have a problem with this plugin, please send me an email letting us know what issues you are having. I will address all issues in a timely fashion. Thank you!
<h3>External Services</h3>
This plugin uses the following third-party services:
<ol>
<li>Incrementable.js 
Used in the contrast testing tool to allow keyboard-accessible incrementable fields. </li>
</ol>
– Loaded from: <code>https://leaverou.github.com/incrementable/incrementable.js</code> 
– No user data is sent. 
– License: MIT License 
– Source: <a href="https://github.com/LeaVerou/incrementable" rel="nofollow ugc">https://github.com/LeaVerou/incrementable</a>
<ol>
<li>Example API (Replace with actual endpoint) 
Used to send page URLs to an external server for SEO auditing (if applicable). </li>
</ol>
– Endpoint: <code>http://myserver.com/</code> 
– Data sent: page URL 
– Sent only during SEO analysis execution. 
– If you operate this server, link your own Privacy Policy here. 
 Example: <a href="https://yourdomain.com/privacy-policy" rel="nofollow ugc">https://yourdomain.com/privacy-policy</a>
<h3>Main Features Are:</h3>
<ol>
<li>
Shows you all of the pictures from either your Media Library, Posts or Pages that are missing any of the 3 types of text. (Alternative Text, Description text or Caption Text)
</li>
<li>
Allows you to add any missing – Alternative Text, Description Text or Caption Text to any of your pictures one at a time.
</li>
<li>
Allows you to add missing Alternative Text, Description Text or Caption Text to all of your pictures with just one click.
</li>
<li>
Helps the process of making your website ADA Section 508 Compliant become much easier. (by adding Alt Text to all pictures on your website)
</li>
<li>
Allows you to run a Automated A11Y Accessibility Audit so you can see where you are not compliant.
</li>
<li>
Provides a free Contrast Ratio Checker. This allows you to easily understand your websites contrast ratios.
</li>
<li>
We provide you a interactive (WCAG 3.0) Section 508 Checklist. This checklist helps you better understand the WCAG 3.0 recommendations and guidelines.
</li>
<li>
We offer a ton of Free Accessibility resources in the form of links that will greatly help your understanding of web accessibility.
</li>
<li>
Access comprehensive accessibility training courses and educational materials to learn best practices and master accessibility implementation.
</li>
</ol>
<h3>The video below is how to use our missing alt text feature.</h3>
<h3>The video below is part 2 on how to use all of the new accessibility tools we added.</h3>
<h3>The video below is us giving our “Web Accessibility Made Easy” talk in Tampa Fl.</h3>
<h3>Source Code</h3>
This plugin includes bundled/minified JavaScript and CSS files to optimize performance. To comply with WordPress.org guidelines for human-readable code, the original, non-minified source code is included directly within the plugin under:
<pre><code>/assets/src/ or `/src/`
</code></pre>
This includes: 
– Original JavaScript files before minification or bundling. 
– SASS/SCSS or uncompiled CSS files (if applicable). 
– Any build configuration files (such as webpack.config.js or angular.json if used).
These files are provided to ensure transparency and promote open-source collaboration.
<h3>License</h3>
This plugin is licensed under the GPLv2 or later. For more information, see <a href="https://www.gnu.org/licenses/gpl-3.0.html" rel="nofollow ugc">https://www.gnu.org/licenses/gpl-3.0.html</a>.

Accessibility Tools & Alt Text Finder

Accessibility Tools Included: Missing Alt text finder, contrast checker, WCAG 3.0 checklist, automated testing software and a ton of free resources.

Block Accessibility Checks vs Accessibility Tools & Alt Text Finder