Free Contrast Checker Online
Check the contrast ratio between two colors for WCAG accessibility compliance with our free online Contrast Checker. Enter foreground and background colors to see the contrast ratio and whether your combination passes WCAG AA and AAA standards for normal text, large text, and UI components. See a live preview of your text on the selected background. Essential for web designers and developers ensuring their designs are accessible to users with visual impairments.
How to Use Contrast Checker
Select Colors
Enter or pick your foreground (text) and background colors using HEX codes or the color picker.
View Contrast Ratio
See the contrast ratio displayed prominently along with an overall accessibility rating.
Check WCAG Compliance
Review pass/fail results for each WCAG level: AA Normal, AA Large, AAA Normal, AAA Large, and UI Components.
Features
WCAG 2.1 Compliance
Check against all WCAG contrast requirements for text and UI components.
Live Text Preview
See how your color combination looks with actual text in a preview panel.
Color Swap
Quickly swap foreground and background colors with one click.
Clear Pass/Fail
Visual pass/fail indicators for each WCAG criterion.
Benefits of Using Contrast Checker
Completely Free
Use Contrast Checker without any cost, limits, or hidden fees. No premium plans needed.
No Installation
Works directly in your browser. No software downloads or plugins required.
100% Private
Your files and data are processed locally. Nothing is uploaded to external servers.
Works Everywhere
Compatible with Chrome, Firefox, Safari, Edge on desktop, tablet, and mobile.
No Sign-Up
Start using the tool immediately. No account creation or email verification.
Always Available
Access this tool 24/7 from anywhere in the world, on any device.
Frequently Asked Questions
Complete Your Design Tools Workflow
These free tools work seamlessly with Contrast Checker to handle every step of your workflow.