Loading page
Tool workspace
Preparing this tool for you.
Tool workspace
Check WCAG contrast ratio for text and background colors.
About this tool
Check WCAG contrast ratio for text and background colors.
Color Contrast Checker is a free design tool that runs entirely in your browser — nothing to install, no account to create, and your data never leaves your device. Open the page, add your input, and get a clean, copy-ready result in seconds.
Open Color Contrast Checker on AltFTool — it loads instantly in your browser.
Paste your code or data sample into the workspace.
Pick the format, conversion, or analysis you need.
Copy the polished result straight back into your project.
Paste snippets, payloads, or commands straight from your editor and get a tidy, shareable result in one step.
Format, convert, or inspect data before it lands in tests, documentation, or production requests.
Use the generated output as a copy-ready starting point instead of writing everything by hand.
Yes — Color Contrast Checker is completely free on AltFTool, with no signup, no trial limits, and no hidden costs.
Yes. Color Contrast Checker runs in your browser, so what you enter or upload stays on your device instead of being sent to a server.
Check WCAG contrast ratio for text and background colors. It's built for quick, everyday design tasks with results you can copy or download straight away.
Yes — Color Contrast Checker works in any modern browser, on desktop, tablet, and mobile, with the same features everywhere.