WCAG Contrast Checker
Ensure your text is readable for everyone by checking color contrast ratios against WCAG 2.1 accessibility standards.
Large Text (18pt / 24px)
Normal text (16px)
3.98:1
Normal Text
For typical body text (under 18pt or 24px).
Large Text
For text 18pt (24px) or 14pt (18.66px) bold.
Web accessibility (often abbreviated as a11y) is the practice of ensuring that websites are usable by everyone, regardless of disability. A critical component of accessibility is color contrast. Sufficient contrast between text and its background is essential for people with low vision or color vision deficiencies. This tool helps you test your color choices against the internationally recognized Web Content Accessibility Guidelines (WCAG).
Level AA
This is the mid-range and most common level of conformance. To meet AA, normal text requires a contrast ratio of at least 4.5:1, and large text requires 3:1. Most websites should aim to meet at least this standard.
Level AAA
This is the highest level of conformance, making content accessible to a wider range of people. To meet AAA, normal text requires a contrast ratio of at least 7:1, and large text requires 4.5:1. This is often required for government websites or those specifically serving users with disabilities.
What is "large text"?
According to WCAG, large text is defined as text that is at least 18 point (typically 24px) or 14 point (typically 18.66px) and bold.
Does this work for text on image backgrounds?
This tool is designed for solid color backgrounds. For text on images or gradients, you must manually pick the most problematic background color behind the text to get a worst-case scenario reading.
Is my data secure?
Yes. All calculations happen in your browser. The colors you enter are never sent to our servers.
Tool guide
How to Use the WCAG Contrast Checker
This guide explains what the tool does, where it fits into a real workflow, and how to use it confidently. It gives first-time visitors a clear written explanation of the page before they start working with their own text, files, or data.
What does this tool do?
The WCAG Contrast Checker helps you check color contrast ratios for accessibility. It is designed for quick, focused work: paste or choose your input, adjust the available options, and copy or download the result when you are done. The page is useful for writers, developers, students, analysts, marketers, and anyone who needs a small conversion job finished without installing another app.
Most tools on Text-Converters.com run directly in your browser, which keeps the experience fast and private. When a tool requires special processing, the page is built to keep the workflow clear so you know what is happening before you use it.
How to use this tool
- Open the WCAG Contrast Checker page and read the options available near the input area.
- Paste text, upload a file, or enter the values that match the task you want to complete.
- Choose any formatting, conversion, privacy, or output options shown by the tool.
- Run the conversion and review the result before copying, downloading, or sharing it.
- Clear the input when you are finished, especially if you worked with private content.
When would you use this?
- A developer debugging a payload, token, checksum, color value, regular expression, or code snippet.
- A technical writer preparing examples that need consistent, readable formatting.
- A student or researcher who needs a quick wcag contrast checker without installing desktop software.
- A remote worker who wants to clean up copied content before pasting it into a document, spreadsheet, CMS, or chat message.
Frequently asked questions
Is the WCAG Contrast Checker free?
Yes. The tool is free to use, with no account, subscription, or payment required.
Do I need to install anything?
No. It works in your browser, so you can use it from a laptop, tablet, or phone.
Is my data stored?
The site is designed around privacy-first browser processing wherever possible. We do not ask you to create an account to use the tool.
Can I use the result commercially?
Yes, but always review the output before relying on it for important, legal, financial, medical, or production work.