Loading Contrast Checker...
What is Contrast Checker?
Contrast Checker is a free online developer tool that check WCAG color contrast ratios for accessibility compliance. Like all FluxBench tools, it runs entirely offline in your browser — no data is ever sent to any server.
How to use Contrast Checker
1
Open the Contrast Checker tool on FluxBench
2
Check WCAG color contrast ratios for accessibility compliance
3
Copy or download your result — ready to use
Common use cases
- Quick contrast checker tasks during development
- Processing data without installing desktop software
- Privacy-sensitive work where data must never leave your device
Frequently Asked Questions
Is Contrast Checker free to use?
Yes, Contrast Checker is completely free on FluxBench. No account, no signup, no payment required.
Does Contrast Checker send my data anywhere?
No. All FluxBench tools run 100% offline in your browser. Your data never leaves your device — we have no backend servers.
Can I use Contrast Checker on mobile?
Yes, FluxBench works on any modern browser including mobile. Just open the tool page on your phone or tablet.
Related tools
Explore more free developer tools from FluxBench: