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Readability Checker

Readability Checkeris a powerful offline tool that allows users to instantly evaluate the color contrast between text and background, ensuring accessibility based on WCAG 2.1 AA standards. The app interface is split into two main panels: • On the left, a Live Preview Panel shows a sample heading and paragraph with your selected text and background colors. This preview updates in real-time, helping users visualize the readability results as they adjust their color selections. • On the right, the Controls Panel features two color pickers (for text and background), two HEX input fields, and a results display. Users can either click on the color boxes to use native color pickers or enter any valid 6-digit HEX code. Once both colors are selected, the app calculates the contrast ratio using the official WCAG formula. The result is displayed in large numbers in the "Contrast Ratio" box. Below that, two pass/fail indicators appear: - **Normal Text (AA)** requires a minimum contrast ratio of 4.5:1 - **Large Text (AA)** requires a minimum contrast ratio of 3:1 If the ratio meets the requirement, it displays **Pass** in green; otherwise, it shows **Fail** in red. The color input fields and color pickers are fully synchronized — changing one will update the other automatically. All changes update the preview and results instantly, with no page reloads. The app runs entirely offline, with n

Install Readability Checker at its install page.

Category: Accessibility