Contrast Checker
Check text and background contrast against WCAG.
6.29:1
Body text (< 18pt / 24px). Minimum ratio 4.5:1.
Large text (≥ 18pt or 14pt bold). Minimum 3.0:1.
Enhanced readability standard. Minimum 7.0:1.
Borders, icons and active elements. Minimum 3.0:1.
Live UI Preview
The quick brown fox jumps over the lazy dog
This live preview card renders text directly with your selected colors so you can visually evaluate legibility and contrast across various font sizes.
How to Use the Contrast Checker
Select or upload your input data/files into the Contrast Checker interface above.
Adjust any custom options, compression levels, or settings to your preference.
Preview the real-time calculations or generated output immediately.
Download your converted file or copy the processed result with one click.
Key Capabilities & Features
- •100% Client-Side Privacy: Processed directly on your device inside your browser.
- •Zero Account Needed: Free to use without signing in or email registration.
- •High Performance & Lossless: Optimized for instant, precise transformations.
- •Universal Compatibility: Works seamlessly across desktop, tablet, and mobile browsers.
100% In-Browser Privacy Guarantee
Your files and data remain strictly on your device. All computations, image processing, and PDF manipulations happen locally in your web browser via WebAssembly and HTML5 APIs. No files are uploaded or stored on any remote servers.