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
Popular Ways to Use Check Contrast
Jump straight to the query-specific guide that matches what you are trying to do, then open the tool when you are ready.
Why teams stay with ZiaSign after the first quick fix
The strongest tool pages do not just solve one file problem. They make the next document task easier to start and easier to trust.
Secure file handling by default
Files are processed securely and automatically deleted after 1 hour so quick PDF jobs do not turn into storage risk.
118 tools and 139 workflow guides
Start with a single tool page, then move into guided document tasks without leaving the platform.
Free to start, deeper when the workflow grows
Anonymous tools cover quick fixes, while accounts, Pro, and Enterprise plans support heavier document operations.
118+
Free PDF Tools
100%
Browser-Based
No
Installation Needed
SOC 2
Compliant Security
Trusted by thousands of professionals worldwide. All files are processed securely in your browser or encrypted servers and automatically deleted.
Need Pro workflows beyond one-off edits?
Compare plans for batch processing, advanced conversions, signatures, and higher-value document operations.
Stay Ahead of Contract Tech
Get monthly insights on AI contract management, e-signature trends, and product updates. No spam, unsubscribe anytime.
Join 2,000+ legal and ops professionals. Unsubscribe anytime.