Accessibility & A11y Tools
Inclusive design and accessibility workbench. Calculate WCAG 2.1 contrast ratios for text and UI elements against Level AA and AAA standards, and preview color blindness simulations.
Available Accessibility & A11y Tools (5)
WCAG Color Contrast Checker
Calculate foreground and background color contrast ratios in real time with WCAG 2.1 Level AA and AAA pass/fail compliance indicators.
Color Blindness Simulator
Simulate how your design and color palettes appear to users with Protanopia, Deuteranopia, Tritanopia, and Achromatopsia.
APCA Contrast Calculator
Calculate Advanced Perceptual Contrast Algorithm (APCA / WCAG 3) Lc values based on modern human spatial vision perception.
Large Text Contrast Checker
Specialized WCAG validator for large typography (18pt/24px normal or 14pt/18.66px bold) requiring 3:1 minimum contrast.
UI Component Contrast Validator
Validate WCAG 2.1 Success Criterion 1.4.11 for non-text UI elements: form input borders, button outlines, icons, and focus rings.
Explore Other Categories
Image Tools
Compress, resize, convert, crop, and optimize images locally in your browser.
PDF Tools
Merge, split, rotate, convert, and organize PDF documents securely on your device.
Developer Tools
Format JSON, inspect JWTs, test regular expressions, encode Base64, and generate hashes.
SEO Tools
Preview SERP listings, analyze keyword density, generate robots.txt, and build Schema markup.