What this tool does
Measure WCAG contrast ratio. It is designed for a focused task rather than a cloud project, making it useful when you need a quick result without handing the source material to another processing service.
How to use colour contrast checker
- Paste or enter the value you want to inspect, convert or generate.
- Choose any relevant format or output option.
- Review the locally produced result for correctness.
- Copy only the data you intend to use and avoid sharing secrets.
Why it is private
Inputs are processed by JavaScript and Web Crypto APIs in this browser. No account, remote execution environment or cloud paste is created.
InYourTab.com does not require a name, email address, payment method or project history for this operation.
Important limitation
Common questions
Is colour contrast checker free?
Yes. The current tool has no subscription, credits, account requirement or watermark.
Does my input leave this device?
No. The available operation is implemented with browser capabilities and locally delivered code. Your working input is not sent to an InYourTab.com processing server.
Will it work on mobile?
The interface is responsive, but large files and media processing can be more reliable on a desktop browser with more memory.