Accessibility Contrast Checker
Check text and background color combinations for WCAG contrast compliance. Get an instant score, pass/fail breakdown, and actionable fixes for low-contrast UI combinations.
Paste HTML and CSS to audit foreground/background color contrast against WCAG AA guidance. The checker finds low-contrast combinations and highlights which pairs pass or fail.
Why Use Our Accessibility Contrast Checker?
Instant Analysis
Our accessibility contrast checker online processes your content instantly in the browser. Get a comprehensive color contrast analysis with detailed scoring, issue detection, and actionable recommendations in milliseconds.
Secure & Private
check accessibility contrast entirely client-side. No data is uploaded to any server. Your content stays on your device, making this the safest way to check accessibility contrast with complete privacy.
No Size Limits
Analyze large HTML documents without restrictions. Our Accessibility Contrast Checker handles pages of any size, processing all color contrast efficiently without artificial limitations.
100% Free Forever
Use our Accessibility Contrast Checker without any cost, signup, or premium tier. check accessibility contrast unlimited times for any project — personal, commercial, or enterprise — completely free.
Common Use Cases for Accessibility Contrast Checker
UI Theme Validation
Check component color pairs in light and dark palettes before release to prevent low-contrast text combinations.
WCAG AA Quick Checks
Verify whether detected foreground and background combinations meet WCAG AA thresholds for normal text readability.
Content Readability Audits
Analyze body text and heading color treatments to ensure sufficient contrast across key reading surfaces.
Design System Review
Audit reusable style blocks and inline component styles to catch accessibility issues early in design-system updates.
Pre-Launch QA
Run a fast contrast report during release QA cycles so pages do not ship with unreadable text color pairings.
Regression Monitoring
Compare repeated audits over time and quickly identify color regressions introduced by refactors or content changes.
Understanding Accessibility Contrast Analysis
What is Accessibility Contrast Analysis?
Accessibility Contrast analysis involves examining text and background color pairs in your HTML and CSS to identify issues, optimisation opportunities, and best practice compliance. A accessibility contrast checker automates this process, checking dozens of factors that affect WCAG readability compliance, visual clarity, and inclusive user experience. Use our accessibility contrast checker online to get instant, actionable insights.
How Our accessibility contrast checker Works
- Parse: Paste your HTML source or upload a file, and our tool parses the document structure to extract all relevant accessibility contrast.
- Analyze: Each extracted element is evaluated against industry standards, SEO best practices, and platform requirements to identify issues and successes.
- Report: Get a scored report with categorised findings (errors, warnings, successes), detailed recommendations, and a preview of how your content appears in search and social.
What Gets Analyzed
- SEO Essentials: Title tag, meta description, canonical URL, robots directives
- Social Media: Open Graph and Twitter Card tags for rich social sharing previews
- Technical: Viewport, charset, structured data, favicon, hreflang, and more
- Best Practices: Tag length limits, duplicate detection, missing required attributes
Typical Use Cases
Our accessibility contrast checker is commonly used for design QA, UI component testing, content accessibility reviews, and regression checks before shipping. Whether you need to check accessibility contrast before publishing a new page or audit existing content, this tool provides the insights you need — instantly, securely, and completely free.
Related Tools
JSON to YAML
Convert JSON to YAML format instantly - Free online JSON to YAML converter
XML to YAML
Convert XML to YAML format for configuration migration - Free online XML to YAML converter
CSV to YAML
Convert CSV spreadsheet data to YAML format - Free online CSV to YAML converter
TSV to YAML
Convert TSV tab-separated data to YAML format - Free online TSV to YAML converter
Frequently Asked Questions - accessibility contrast checker
A accessibility contrast checker is a tool that examines accessibility contrast in your HTML to identify SEO issues, missing information, and optimisation opportunities. Our accessibility contrast checker online runs entirely in your browser, providing instant scored reports with actionable recommendations.
Our accessibility contrast checker examines title tags, meta descriptions, Open Graph tags (og:title, og:description, og:image, og:url, og:type), Twitter Card tags, canonical URLs, viewport settings, charset encoding, robots directives, structured data, favicon links, hreflang tags, and more. Each check is categorised as SEO, Social, Technical, or Accessibility.
Absolutely! All analysis runs directly in your browser using JavaScript — no data is sent to any server. Your HTML content never leaves your device, ensuring complete privacy and security when you check accessibility contrast.
The score is calculated out of 100 points based on weighted factors. Critical elements like the title tag and meta description carry more weight, while supplementary tags like author or keywords carry less. The score reflects how well your page follows current SEO best practices and standards.
Yes, our accessibility contrast checker is 100% free with no hidden costs, signup requirements, premium tiers, or usage limits. Use it unlimited times for any project — personal, commercial, or enterprise.
WCAG AA requires at least 4.5:1 for normal-sized text and 3:1 for large text. This tool reports both thresholds for each detected color pair.
The checker supports hex values (#fff, #ffffff), rgb/rgba, hsl/hsla, and common named colors such as black, white, red, blue, and gray.
It analyzes color and background declarations inside style blocks and inline styles in the provided HTML input. It is a fast audit tool for practical checks.
No. Analysis runs entirely in your browser, so your code remains private and local.