Check ContrastPro
Check text-to-background contrast for WCAG compliance. Pro plan required. Secure and fast.
How to Check Contrast
Upload your PDF
Contrast ratios are analyzed
View the WCAG compliance report
Frequently Asked Questions
1What contrast ratio is required?
WCAG AA requires 4.5:1 for normal text and 3:1 for large text.
2What 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.
3Does 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.
4How 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.
Why Use ZiaSign's Check Contrast Tool?
ZiaSign's contrast checker analyzes text-to-background color contrast ratios throughout your PDF. Verify WCAG AA and AAA compliance. Identify low-contrast text that may be difficult to read for users with low vision.
Also known as: pdf contrast check · wcag contrast ratio · pdf accessibility contrast · text contrast checker
How-to guide
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Step-by-step instructions to check text-to-background contrast for wcag compliance with ZiaSign.
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