Check Contrast Advanced
Check text-to-background contrast for WCAG compliance. Pro plan required.
How to Check Contrast
Upload your PDF
Contrast ratios are analyzed
View the WCAG compliance report
Common questions
Frequently Asked Questions
What contrast ratio is required?
WCAG AA requires 4.5:1 for normal text and 3:1 for large text.
What is WCAG AAA?
WCAG AAA is the highest accessibility level, requiring 7:1 for normal text and 4.5:1 for large text. AA is the minimum standard.
Does low contrast affect all users?
Yes. Low contrast text is harder to read for everyone, especially users with low vision, color blindness, or in bright lighting conditions.
How do I fix contrast issues?
Increase the difference between text and background colors. The report shows exact ratios and suggests minimum color adjustments for compliance.
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