38

Focus Order Analyzer - Online Tab Navigation Check

Enter a URL and extract tab‐index order violations and focusable elements. Quick accessibility audit. Client‑side fetch.

Accessibility accessibility focus keyboard tabindex

36

Image Color Blindness Simulator - Upload & See

Upload any image and view it as a person with deuteranopia, protanopia, or tritanopia would. Promote inclusive design.

Accessibility color blindness daltonize image simulator

36

Speech Synthesis Demo - Online Text to Voice with Controls

Write text and pick a voice, rate, and pitch to test your browser's speech synthesis capabilities. No download.

Accessibility speech synthesis TTS voice

35

Text to Speech - Online Free TTS Reader & Converter

Type or paste text and have it read aloud by your browser's speech synthesis engine. Control voice, pitch, and rate. No download, works offline.

Accessibility reader text to speech TTS voice

34

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.

Accessibility accessibility contrast finder WCAG

34

Braille to Text Converter - Online Decode Dot Patterns

Enter Braille dot numbers (1‑6) or paste Unicode Braille to decode into English text. Companion to text‑to‑Braille.

Accessibility accessibility Braille decode text

33

TTS Reader with Word Highlight - Online Speak & Read Along

Paste any text and have it read aloud while each spoken word is highlighted. Improve reading focus. Web Speech API.

Accessibility highlight read aloud speech TTS

33

Accessible Palette Checker - Online Simulate & Recommend

Paste a set of hex colors and simulate how they appear with common color vision deficiencies. Get contrast warnings.

Accessibility accessible colorblind palette simulate

33

Accessible Text Formatter - Online Dyslexia Friendly Layout

Apply dyslexia‑friendly fonts, spacing, and background to any text. Preview and copy the formatted version. Improve readability.

Accessibility accessible dyslexia format text

33

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.

Accessibility accessibility color blindness simulator vision

32

Relative Luminance Calculator - Online WCAG Metrics

Enter a hex color and get its relative luminance per WCAG definition. Understand why this matters for contrast.

Accessibility calculator color luminance WCAG

32

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.

Accessibility accessibility brightness luminance WCAG

31

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.

Accessibility accessibility ARIA landmarks viewer

31

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.

Accessibility accessibility checker color contrast WCAG

30

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.

Accessibility accessibility ARIA HTML screen reader

30

Speech Recognition Tester - Online Web Speech API Demo

Test your browser's built‑in speech recognition. Speak and see the transcribed text appear live. Must‑have for voice app devs.

Accessibility dictation recognition speech voice

30

Colorblind Friendly Palette Checker - Online Simulate & Advise

Enter a color palette and see how it looks for different types of color vision deficiency. Get warnings on conflicting colors.

Accessibility accessible colorblind design palette

29

Speech to Text Dictation - Online Live Transcribe

Use the Web Speech API to turn your spoken words into text with punctuation. Copy and paste anywhere. Privacy‑first.

Accessibility dictation speech text transcribe

27

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.

Accessibility accessibility braille converter text

27

Accessible Color Contrast Grid - Online Test Combinations

Enter a palette of colors and see a grid showing whether each foreground/background pair passes AA or AAA contrast. Must for designers.

Accessibility checker contrast grid WCAG

26

APCA Contrast Checker - Online New Accessible Perceptual Contrast

Check the Accessible Perceptual Contrast Algorithm (APCA) ratio. The next‑generation contrast method for WCAG 3.

Accessibility accessibility APCA contrast WCAG 3

26

Roving Tabindex Keyboard Nav - Online Accessible List

See the roving tabindex pattern in action. Use arrow keys to navigate a list. Copy the accessible JavaScript pattern.

Accessibility a11y demo keyboard roving tabindex

26

ASL Alphabet Quiz - Online Fingerspelling Practice

Test your knowledge of American Sign Language letters. See a sign and type the letter. Improve receptive skills. Local.

Accessibility alphabet ASL fingerspelling quiz

25

Colorblind-Safe Palette Builder - Online Check & Generate Schemes

Build a palette and simulate how it appears to various color deficiencies. Also generate pre-vetted accessible palettes. Local processing.

Accessibility accessible colorblind palette

25

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.

Accessibility accessibility audit contrast URL

25

Heading Structure Visualizer - Online Document Outline Check

Paste an URL or HTML and see the h1‑h6 hierarchy as a tree. Detect skipped levels and improve accessibility. Client‑side.

Accessibility accessibility headings outline SEO

25

Speech Live Counter - Online Count Spoken Words

Speak into the mic and see a live transcript with word count. Uses the Web Speech API. Nothing is stored.

Accessibility live recognition speech word count

25

SSML Generator & TTS Demo - Online Speech Synthesis

Write SSML to control pitch, speed, and breaks. Play the generated speech with the browser’s TTS engine. Learn SSML.

Accessibility speech SSML synthesis TTS

25

Text to Braille Image - Online Embossable PNG Generator

Convert short text into a black‑and‑white Braille bump image ready for embossing. Educational and inclusive.

Accessibility accessible Braille generator image

24

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.

Accessibility accessibility alt text generator SEO

24

forced‑colors Mode Tester - Online Windows High Contrast

Simulate forced‑colors mode and see how your site looks. Adjust CSS system colors. Make your design accessible.

Accessibility a11y forced‑colors high contrast test

24

ARIA Attribute Validator - Online Check HTML Accessibility

Paste an HTML snippet and check for common ARIA mistakes: missing labels, invalid roles, and aria‑hidden misuse. Educate your team.

Accessibility accessibility ARIA HTML validator

24

<abbr> Tag Generator - Online HTML Abbreviation Builder

Type an abbreviation and its full form to get the proper `<abbr title='...'>` HTML. For accessible markup.

Accessibility abbr accessibility generator HTML

23

Text to Speech Reader - Online Listen to Any Text

Paste or type text and have it read aloud with natural voices. Control speed and pitch. Uses browser's built‑in TTS.

Accessibility reader text to speech TTS voice

23

aria‑describedby Visualizer - Online Check Descriptions

Highlight elements with aria‑describedby and see the linked description text. Verify a11y annotations.

Accessibility accessibility aria‑describedby debug visualizer

23

HTML lang Validator - Online Check Language Tag

Validate a language tag like en‑US or zh‑Hans against the IANA registry. Ensure correct HTML lang attribute.

Accessibility BCP 47 HTML lang validator

23

Screen Reader Text Optimizer - Online Improve Alt & Link Text

Analyze text for screen reader friendliness: detect vague link text, missing alt suggestions. Get a report. Local.

Accessibility alt text links optimizer screen reader

23

Custom Focus Ring Styler - Online CSS :focus‑visible Designer

Design a custom focus indicator with outline, offset, and box‑shadow. Preview on interactive elements. Copy the CSS.

Accessibility a11y CSS designer focus ring

23

SSML Marker Demo - Online TTS Events & Highlights

Use SSML <mark> tags to fire events during TTS. See text highlighted as it is spoken. Understand speech synthesis timing. local.

Accessibility mark speech SSML TTS

22

:focus‑visible vs :focus Demo - Online Accessible Outlines

See the difference between :focus and :focus‑visible on interactive elements. Learn which to use for better UX.

Accessibility accessibility CSS demo focus‑visible

22

Speech to Text Dictation - Online Transcribe Audio & Mic

Use your microphone to dictate text and see it appear live. Also upload an audio file for transcription (limited). All local.

Accessibility dictation speech to text transcribe web speech

22

Enhanced Color Blindness Simulator - Image & UI Combined

Upload an image and also see a UI mockup under different deficiencies side‑by‑side. Powerful for inclusive design.

Accessibility color blindness inclusive simulator UI

22

ARIA Live Region Tester - Online Screen Reader Update

Inject dynamic messages into ARIA live regions and monitor how they trigger screen reader announcements. Debug a11y.

Accessibility ARIA debug live region screen reader

22

Braille Alphabet Trainer - Online Learn Dot Patterns

Flashcards for learning Braille. See the dot pattern and type the letter. Track your speed and accuracy. Accessibility education.

Accessibility alphabet Braille dots trainer

22

prefers‑contrast Tester - Online High/Low Contrast Emulator

Force more or less contrast and see how your page adapts. Test your CSS media queries for accessibility.

Accessibility a11y emulator media query prefers‑contrast

22

prefers‑reduced‑motion Tester - Online A11y Check

Simulate reduced motion preference and test your animations. Copy the media query snippet. Keep your users safe.

Accessibility a11y media query prefers‑reduced‑motion test

21

ARIA Label Checker – Online Paste HTML Search for Missing Labels

Paste HTML snippet and highlight interactive elements missing accessible labels. Quick a11y audit.

Accessibility ARIA label validator

21

Random Accessible Palette Generator - Online WCAG Safe

Generate a random 5‑color palette where every adjacent pair passes WCAG AA contrast. Safe for inclusive designs.

Accessibility accessible palette random WCAG

21

ARIA Graphics Roles Validator - Online Check SVG a11y

Paste an SVG and check if the graphic‑aria roles are used correctly. Improve accessible diagrams and icons.

Accessibility accessibility ARIA graphics SVG

21

ARIA Live Region Monitor - Online See Dynamic Announcements

Watch for updates to aria‑live regions and log what a screen reader would announce. Debug live regions.

Accessibility announcement ARIA live region monitor

21

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.

Accessibility accessibility focus keyboard tab order

21

Screen Reader Text Simulator - Online See What It Says

Enter an HTML snippet and see a rough transcription of what a screen reader might announce. Check alt texts.

Accessibility alt text announce screen reader simulator

21

Screen Reader Text Visualizer - Online View Hidden A11y Content

Paste a website's HTML and see which text is only visible to screen readers (e.g., .sr‑only). Preview the accessible layer.

Accessibility a11y screen reader text visualizer

20

Focus Indicator Designer – Online CSS Outline Generator

Visually design a custom :focus‑visible outline style. Copy the CSS. Better than the default.

Accessibility CSS focus outline

20

Gradient Text Contrast Checker – Online WCAG Over Background

Type text and set a gradient, then check contrast against a solid background. Ensure readability.

Accessibility accessibility contrast gradient

20

Live Page Color Blindness Check – Online Enter URL

Enter a website URL and apply a protanopia/deuteranopia/tritanopia filter. Test full page accessibility.

Accessibility color blindness filter URL

20

Keyboard Accessibility Tester – Online Check Tab Order

Paste HTML snippet and see calculated tab order. Identify missing focusable elements. A11y helper.

Accessibility a11y keyboard navigation

20

Colored Overlay Simulator – Online Tinted Reader

Apply a color tint overlay over text to see if it helps reading comfort. Trial for visual stress.

Accessibility colored overlay reading tint

20

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.

Accessibility a11y focus order tabindex

20

Screen Reader Text Preview - Online See Hidden A11y Labels

Enter HTML with aria-labels and see what a screen reader would announce. Simulates common patterns. Local educational tool.

Accessibility a11y preview screen reader text