UD5 Toolkit
Text Contrast Validator - Online WCAG AAA Checker
Enter a text color and background color and instantly see if the combination passes WCAG AA and AAA ratio. Safe colors.
Tag: Accessibility Checker - A11y
28+ toolsSkip Navigation Link Generator - Online A11y Helper
Create a properly styled 'Skip to Content' link. Customize target and appearance. Essential for keyboard users. Copy the HTML/CSS.
Color Contrast Ratio Tester - Online WCAG AA/AAA Check
Enter foreground and background colors to instantly see the contrast ratio and pass/fail for AA and AAA. Simple and fast.
Accessible Color Contrast Matrix â Online Paste Palette & Check
Paste hex colors, generate a contrast matrix against each other. Identify failing pairs for WCAG.
Image Alt Text Linter - Online Check Missing & Redundant Alts
Paste an HTML snippet and get a report on missing, empty, or suspicious alt texts. Improve your image SEO and a11y.
Focus Outline Styler - Online Design Accessible Rings
Design a custom focus indicator with outline, offset, and boxâshadow. Preview on interactive elements. Copy the CSS.
Gradient Text Contrast Checker â Online WCAG Over Background
Type text and set a gradient, then check contrast against a solid background. Ensure readability.
Skip Link Validator - Online See Bypass Blocks
Check if your site has a visible and functional skip navigation link. Key for keyboardâonly users.
ARIA Graphics Roles Validator - Online Check SVG a11y
Paste an SVG and check if the graphicâaria roles are used correctly. Improve accessible diagrams and icons.
Tab Order Visualizer - Online See Focus Navigation Path
Enter a URL and see a visual map of the tab order. Detect broken tabindex values. Improve keyboard navigation.
ariaâdescribedby Visualizer - Online Check Descriptions
Highlight elements with ariaâdescribedby and see the linked description text. Verify a11y annotations.
:focusâvisible vs :focus Demo - Online Accessible Outlines
See the difference between :focus and :focusâvisible on interactive elements. Learn which to use for better UX.
contrastâcolor() Preview - Online Automatic Text Color
Test the upcoming contrastâcolor() CSS function. Get white or black automatically for a given background. See it live.
Alt Text Suggestion Tool - Online Image Description Generator
Upload an image and get a suggested alt text description using a local vision model (WASM). Improve SEO and accessibility fast.
ARIA Attribute Validator - Online Check HTML Accessibility
Paste an HTML snippet and check for common ARIA mistakes: missing labels, invalid roles, and ariaâhidden misuse. Educate your team.
<abbr> Tag Generator - Online HTML Abbreviation Builder
Type an abbreviation and its full form to get the proper `<abbr title='...'>` HTML. For accessible markup.
Live Site Contrast Checker - Online Audit By URL
Enter a URL and fetch its text/background colors to perform a bulk contrast check. See warnings for WCAG violations.
Heading Structure Visualizer - Online Document Outline Check
Paste an URL or HTML and see the h1âh6 hierarchy as a tree. Detect skipped levels and improve accessibility. Clientâside.
APCA Contrast Checker - Online New Accessible Perceptual Contrast
Check the Accessible Perceptual Contrast Algorithm (APCA) ratio. The nextâgeneration contrast method for WCAG 3.
Text to Braille Converter - Online Grade 1 & 2 English
Convert English text to Braille (Grade 1 and simple Grade 2 contractions). Educational tool to understand Braille representation. Local only.
Screen Reader Test Snippet - Online Check HTML ARIA Labels
Paste an HTML snippet and see how a screen reader might interpret it. Highlights missing alt texts and ARIA misuses. Educational.
Landmark Region Viewer - Online See ARIA Landmarks of Any Page
Enter a URL and see a list of its ARIA landmarks (banner, main, nav). Check document structure for accessibility. Local fetch.
Perceived Brightness Calculator - Online Luminance Formula
Calculate the perceived brightness of an RGB color and determine if black or white text is more readable. Accessibility tool.
Color Contrast Checker - Online WCAG Accessibility Validator
Check the contrast ratio between foreground and background colors to ensure web accessibility compliance. Get WCAG 2.1 AA/AAA pass/fail results instantly.
Color Blindness Simulator - Online Vision Deficiency Preview
Simulate how images and UI elements appear to users with various types of color blindness. Upload or paste image URL. Promote inclusive design.
Accessible Color Contrast Finder - Online WCAG 2.1 Helper
Given a background color, this tool suggests foreground colors that meet AA/AAA contrast ratios. Works for all vision types.
Braille to Text Converter - Online Decode Dot Patterns
Enter Braille dot numbers (1â6) or paste Unicode Braille to decode into English text. Companion to textâtoâBraille.
Focus Order Analyzer - Online Tab Navigation Check
Enter a URL and extract tabâindex order violations and focusable elements. Quick accessibility audit. Clientâside fetch.