d2itechnology

D2i Accessibility Toolkit injects a floating accessibility panel into the front-end of any WordPress site. Visitors can activate assistive adjustments in a single click without needing to change their browser or operating system settings.
<blockquote>
Important notice: This plugin helps users customise their browsing experience. It does not automatically make your website fully compliant with WCAG, ADA, Section 508, or EN 301 549. Website owners remain responsible for ensuring their content (semantic HTML, image alt text, captions, heading structure, and color contrast in their own designs) meets applicable standards.
</blockquote>
<h4>Features</h4>
<ul>
<li>Contrast modes — Dark, Light, High Contrast (cycle through)</li>
<li>Highlight Links — high-visibility outlines and backgrounds on all links</li>
<li>Bigger Text — 100 % → 120 % → 140 % → 160 % → 180 % → 200 % (rem-based, reflows correctly)</li>
<li>Text Spacing — applies WCAG 1.4.12 exact values (line-height 1.5, letter-spacing 0.12 em, word-spacing 0.16 em, paragraph spacing 2 em)</li>
<li>Pause Animations — stops CSS animations/transitions; pauses <code><video autoplay></code>; respects <code>prefers-reduced-motion</code> automatically</li>
<li>Hide Images — hides img/picture/SVG; injects alt text as visible text nodes</li>
<li>Dyslexia Friendly — applies OpenDyslexic font (bundled locally, no CDN), increases line-height and letter-spacing</li>
<li>Big Cursor — 64 px white or black cursor SVG, locally bundled</li>
<li>Line Height — Default → 1.5 → 1.75 → 2.0 → 2.5</li>
<li>Text Alignment — Default → Left → Centre → Right (justify excluded per WCAG 1.4.8)</li>
<li>Reset All — one click restores defaults, clears LocalStorage</li>
</ul>
<h4>Compliance support</h4>
The widget provides user-facing adjustments that support meeting:
<ul>
<li>WCAG 2.1 Level AA (all applicable SCs)</li>
<li>WCAG 2.2 new SCs (2.4.11 Focus Not Obscured, 2.5.8 Target Size ≥ 44 × 44 px, 3.2.6 Consistent Help)</li>
<li>ADA Title II / III</li>
<li>Section 508 Refresh</li>
<li>EN 301 549</li>
</ul>
<h4>Privacy</h4>
<ul>
<li>No external requests — all fonts, cursors, and icons are bundled locally</li>
<li>No tracking, no analytics, no phone-home</li>
<li>User preferences are stored in browser LocalStorage only — no cookies, no database writes</li>
</ul>
<h4>Widget accessibility</h4>
The widget itself is fully accessible:
<ul>
<li>All controls are semantic <code><button></code> elements</li>
<li>Color contrast ≥ 4.5:1 within the widget</li>
<li>Touch targets ≥ 44 × 44 px</li>
<li>Keyboard navigable; focus trapped while panel is open; Escape to close</li>
<li>Full ARIA: <code>role="dialog"</code>, <code>aria-modal</code>, <code>aria-labelledby</code>, <code>aria-pressed</code>, <code>aria-expanded</code>, <code>aria-live</code></li>
<li>Tested with NVDA, JAWS, VoiceOver, TalkBack</li>
<li>Widget is never affected by its own filters (invert/saturation are counter-filtered on the widget container)</li>
</ul>

D2i Accessibility Toolkit

Floating accessibility widget with one-click WCAG 2.1/2.2, ADA, Section 508 & EN 301 549 adjustments. Free, no upsells, no external requests..

UserWay

Web accessibility can seem complex and overwhelming if you don’t know where to start.
Let us make it easier, and, to coin a phrase, more accessible for everyone. UserWay’s Accessibility Widget creates a simpler and more accessible browsing experience for your users while increasing compliance with WCAG 2.1, ATAG 2.0, European EN 301 549, ADA, & Section 508 requirements.
UserWay’s Accessibility Widget will strengthen any weak areas that could cause accessibility issues on your site. We are proud to say that a significant number of websites are more accessible today thanks to UserWay.
UserWay’s Accessibility Widget makes smart modifications to elements on your site that are identified as being non-compliant, that may prevent keyboard-only navigation, or are in violation of ADA regulations.
Install UserWay’s Accessibility Widget today. 
After installing UserWay’s Accessibility Widget, you will receive login instructions to the widget via email.
ADA & WCAG 2.1 Compliance 
UserWay’s best-in-class accessibility solutions move your site towards ADA and WCAG 2.1 compliance.
Shield Against Lawsuits 
Increasing your accessibility provides real, sustainable improvement for all users, and protects you from accessibility-related lawsuits.
Improve SEO, Boost Traffic 
Make your commitment clear: a more inclusive site for everyone expands your demographic and boosts your SEO.

Accessibility by UserWay

There is no such thing as a quick fix (one button click) for accessibility. This widget may be, at best, work like a small band aid. 

An accessible website needs amongst other things, semantic HTML5, good keyboard accessibility, meaningful (handwritten) alt texts for images and good screen reader feedback. This widget cannot provide that.

The claim: “WCAG 2.1 AA Compliance is Within Reach” is a very bold one.

Design and build a website from the start with accessibility in mind.
The WordPress Accessibility Handbook is a good starting point.

Note to the developer:
The button to activate the widget doesn’t get keyboard focus. So can’t be activated by keyboard users.

If you want to know more, I recommend reading:
Reminder: Accessibility can’t be solved automatically by Joe Dolson.

There is no such thing as a quick accessibility fix

UserWay’s Accessibility Widget creates a simpler and more accessible browsing experience for your users.

D2i Accessibility Toolkit vs Accessibility by UserWay