UD5 Toolkit
ariaâdescribedby Visualizer - Online Check Descriptions
Highlight elements with ariaâdescribedby and see the linked description text. Verify a11y annotations.
Screen Reader Text Visualizer - Online View Hidden A11y Content
Screen Reader Text Visualizer
Reveal hidden accessibility content â sr-only text, ARIA labels, alt text & more
A11y Inspector
Detected:
0 SR-Only
0 ARIA Labels
0 Descriptions
0 Alt Texts
0 Roles
Total: 0
Live Preview Ready
Paste HTML and click "Render & Visualize"
Hidden A11y content will appear highlighted here
Detected A11y Content 0 items
No A11y content detected yet
Results will appear here after rendering
Frequently Asked Questions
What is screen reader-only (sr-only) text?
Screen reader-only text is content visually hidden but accessible to assistive technologies like screen readers. It uses CSS techniques (position: absolute, clip, 1px dimensions) to hide content from sighted users while keeping it in the accessibility tree. Common examples include "Skip to content" links and form label clarifications.
Why do developers use sr-only content?
Developers add sr-only text to provide context that's obvious visually but missing for screen reader users. For instance, icon buttons need hidden labels, data tables may need hidden headers, and page sections often have hidden navigation landmarks. It bridges the gap between visual design and accessible experience.
What's the difference between aria-label and sr-only?
aria-label is an HTML attribute that provides an accessible name directly on an element, while sr-only uses CSS-hidden DOM text. aria-label doesn't appear in the DOM as visible text; sr-only text exists in the DOM but is visually hidden. Both serve screen readers but have different use cases and browser/translation tool behaviors.
How does this visualizer help with accessibility testing?
This tool reveals invisible accessibility content by parsing your HTML and highlighting hidden elements in a live preview. It detects sr-only classes, ARIA attributes, alt text, roles, and aria-hidden elements â giving you a complete map of what screen reader users actually encounter. Essential for accessibility audits and debugging.
What are common sr-only CSS patterns detected?
We detect Bootstrap's .visually-hidden / .sr-only, Tailwind's .sr-only, and custom classes matching patterns like screen-reader-text, assistive-text, and visuallyhidden. We also flag inline styles using clip, clip-path, or position:absolute with tiny dimensions (1px Ă 1px).
Can I test a live website URL with this tool?
Browser CORS policies may prevent direct URL fetching. For best results, use browser DevTools to copy the page's HTML (Right-click â View Page Source â Copy), then paste it here. This ensures you get the complete DOM including all sr-only and ARIA content.
Accessible Text Formatter - Online Dyslexia Friendly Layout
Apply dyslexiaâfriendly fonts, spacing, and background to any text. Preview and copy the formatted version. Improve readability.
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.
Tab Focus Order Checker - Online Visualize Tab Navigation Flow
Paste HTML and see the order in which elements would receive focus via Tab key. Highlight issues. Local accessibility testing.
Focus Order Analyzer - Online Tab Navigation Check
Enter a URL and extract tabâindex order violations and focusable elements. Quick accessibility audit. Clientâside fetch.
:focusâvisible vs :focus Demo - Online Accessible Outlines
See the difference between :focus and :focusâvisible on interactive elements. Learn which to use for better UX.
ariaâhidden Conflict Finder - Online A11y Audit
Paste HTML and detect elements with ariaâhidden='true' that contain focusable children. An easy a11y win to fix.
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.
Text Outline Generator - Online Structured Hierarchical View
Paste plain text and turn it into a nested outline using indent levels or Markdown headings. Great for planning.
prefersâreducedâmotion Tester - Online A11y Check
Simulate reduced motion preference and test your animations. Copy the media query snippet. Keep your users safe.
contentâvisibility: auto Tester - Online Render Deferral
Apply contentâvisibility: auto to offâscreen sections and see the rendering cost drop. Demos for infinite scroll optimization.
Book Reading List - Online Track ToâRead & Finished
Add book titles and authors to a toâread list. Move them to 'finished' and add a rating. Data saved locally.
Caffeine HalfâLife Tracker - Online Blood Level Visualizer
Visualize how caffeine decays in your body over time. Enter intake amount and see remaining caffeine at bedtime to optimize sleep. Uses standard 5-hour half-life.
RealâSample Contrast Checker - Online See Paragraph
See how a full paragraph looks with your chosen text and background colors. Not just a ratio; the real appearance.
HTML Structure Viewer - Online Indented Tag Explorer
Paste HTML and see a collapsible tree of tags. Understand document outline and nesting. Handier than raw code.
Relative Color Syntax Visualizer - Online Adjust Lightness/Chroma
Start from a base color and use `oklch(from color l c h)` to create lighter or darker variants. Copy the code.
Sorting Algorithms Visualizer - Online Bubble, Quick & Merge
Watch classic sorting algorithms step through a randomized bar chart. Adjust speed and array size. Great for learning algorithm efficiency.
View Timeline Playground - Online ElementâInâView Animations
Animate elements as they enter and exit the viewport using view() timeline. Parallax and reveal effects without JS.
Local Font Viewer & Preview - Online Test Styles
Browse the fonts installed on your system and type a custom phrase to see how it looks. Uses Local Font Access API where available.
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.
Text to Binary Grid - Online Visual Representation
Enter text and see each character's 8âbit binary laid out in a blackâandâwhite grid. Beautiful data art. Local.
Focus Outline Styler - Online Design Accessible Rings
Design a custom focus indicator with outline, offset, and boxâshadow. Preview on interactive elements. Copy the CSS.
AcceptâLanguage Header Visualizer - Online Locale Match
Paste your AcceptâLanguage header and see which languages your site should serve based on quality values. Internationalization helper.
scrollbarâgutter Tester - Online Prevent Layout Shift
Toggle scrollbarâgutter: stable to reserve space for the scrollbar and avoid content jumps. Visual demo with two columns.
Navigation Timing API Viewer - Online Page Load Breakdown
See your current page load broken down into DNS, TLS, request, and DOM phases. Understand where time is spent.
Navigation Timing API Viewer - Online Page Load Breakdown
See your current page load broken down into DNS, TLS, request, and DOM phases. Understand where time is spent.
PGP Message Viewer - Online Decode & Inspect
Paste an ASCIIâarmored PGP message and view its packet structure. See the encrypted/plaintext blocks without decrypting.
Data Structure Visualizer - Online Array, Stack, Queue
Add, remove, push, pop items and watch the data structure change visually. Supports arrays, stacks, and queues. For CS students.
overscrollâbehavior Tester - Online Prevent PullâtoâRefresh
Test overscrollâbehavior: contain to prevent background scroll or pullâtoârefresh. See the effect in a live demo.
CSS Text Stroke Generator - Online Outline Text Effect
Create outlined text with the textâstroke property. Adjust width and color. Preview and copy the CSS.