Free Contrast Checker Online — 100% Free, No Hidden Costs
Looking for a completely free contrast checker? FlexyPdf's Contrast Checker is 100% free with no hidden costs, no premium tiers, and no usage limits. Unlike other tools that restrict features behind paywalls or limit the number of free operations per day, our Contrast Checker gives you full access to every feature without spending a penny. There is no trial period — the tool is free today and will remain free. All processing happens locally in your browser, which means we have no server costs to pass on to you. Whether you need to use Contrast Checker once or a hundred times a day, it costs nothing.
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.