UD5 Toolkit
Live Website Audit Checker - Online Quick SEO & Performance
Enter a URL and get a oneâpage report of titles, description, headings, image alts, and broken links. All from browser.
Live Site Contrast Checker - Online Audit By URL
Live Site Contrast Checker
Enter any URL to instantly audit its text contrast against WCAG 2.1 standards. See which elements pass or fail AA/AAA compliance.
Please enter a valid URL (starting with http:// or https://).
This is a simulated live audit. For real-time checks of your own pages, try our Chrome Extension.
Overall Grade
AA
Passes AA, fails some AAA
AA 72%
AAA 45%
Contrast Issues Breakdown
| Element | Text Sample | Colors | Ratio | AA | AAA | Status |
|---|
Frequently Asked Questions
Contrast ratio measures the difference in luminance between text and its background. A higher ratio improves readability, especially for users with low vision or color blindness. WCAG 2.1 requires at least 4.5:1 for normal text (AA) and 7:1 for enhanced contrast (AAA).
This demo performs a simulated scan using typical contrast patterns. For a true pixel-perfect audit of your own site, we recommend our Chrome Extension, which captures rendered colors exactly as users see them, or use our API for automated bulk checking.
AA is the minimum requirement for most web accessibility laws (e.g., Section 508). AAA is the enhanced level with stricter contrast rules: 7:1 for normal text and 4.5:1 for large text (vs. AA's 4.5:1 and 3:1). AAA compliance is harder but provides better readability.
The simulation checks a representative set of text nodes (paragraphs, headings, buttons, links). In a full live audit, every visible text element is analyzed, including those inside iframes or dynamically loaded content (via the extension).
Adjust either the text color or background color to meet the required ratio. Use our integrated color picker or consult our contrast ratio calculator for exact adjustments. Often darkening the text or lightening the background solves most problems.
Gradient Text Contrast Checker â Online WCAG Over Background
Type text and set a gradient, then check contrast against a solid background. Ensure readability.
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.
Extract Color Palette from Image URL - Online Without Upload
Enter an image URL to extract a 5-color dominant palette. Avoids uploading files. Uses canvas to read remote image pixels. Fast and privacy-oriented.
ariaâhidden Conflict Finder - Online A11y Audit
Paste HTML and detect elements with ariaâhidden='true' that contain focusable children. An easy a11y win to fix.
Protocol Handler Registration - Online Register URL Scheme
Learn how to register your PWA to handle custom URL protocols. See the manifest entry and test.
URL Canonicalizer - Online Normalize & Compare
Enter two URLs and see if they resolve to the same canonical form after normalization. Find duplicate content issues.
ariaâdescribedby Visualizer - Online Check Descriptions
Highlight elements with ariaâdescribedby and see the linked description text. Verify a11y annotations.
Blob URL Generator - Online Create Temporary Object URL
Create a Blob from text or a file and generate a temporary URL for it. Understand the Blob API. Dev demo.
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.
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.
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.
Image Brightness & Contrast Slider - Online Photo Tune
Quickly adjust the brightness and contrast of an image with live preview sliders. Download the tuned photo. Canvas.
Extract Colors from Image URL - Online Palette Generator
Paste a direct link to an image and get its 5 dominant colors with hex codes. No upload, uses canvas with CORS proxy.
Image Contrast Enhancer - Online Histogram Equalization
Automatically improve the contrast of dark or washedâout photos using histogram equalization. Oneâclick autoâtune. All canvasâbased.
Open Graph Audit Tool - Online Check Social Meta
Enter a URL and see a preview of how it will appear when shared on Facebook, Twitter, LinkedIn. Detect missing tags.
Random Palette from Image URL - Online Surprise Colors
Enter the URL of any image and receive a random harmonious palette extracted from it. Click to regen. For quick inspiration.
Image Color Picker From URL - Online Remote Picture Analyzer
Enter the URL of any online image and extract its dominant colors or pick colors with a magnifier. No upload, crossâorigin friendly.
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.
Advanced Slug Generator - Online Custom Separator & Language
Convert title to URL slug with options: ignore stop words, transliterate special characters, choose separator. SEO friendly.
Image Color Palette from URL - Online Remote Photo Analysis
Enter an image URL and extract its dominant color palette. No download needed. Fast visual analysis.
Focus Order Analyzer - Online Tab Navigation Check
Enter a URL and extract tabâindex order violations and focusable elements. Quick accessibility audit. Clientâside 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.
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.
Query Parameter Extractor - Online URL Param Table Viewer
Enter a full URL and get all query parameters in a clean table with decoded values. Quickly see UTM and tracking params.
URL Shortener Decoder - Online Expand Shortened Links
Find out the real destination of any shortened link (bit.ly, t.co, etc.) without clicking. Resolves redirects locally using public HTTP headers.
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.
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.
Text to Slug Converter - Online URL Slug Generator
Convert titles and sentences into clean URL slugs. Handles special characters, spaces, and case. Essential for CMS users and developers creating SEO-friendly links.