WCAG Color Contrast Checker
Verify text and background color pairs meet WCAG contrast requirements.
- No login
- Free to use
- Processes locally
- No files uploaded
Try the WCAG Color Contrast Checker
Processed locally in your browser
Your input and generated output are processed locally and are not sent to our servers for tool execution.
Examples
Sample input for WCAG Color Contrast Checker
Paste a realistic sample here and run the tool.
Processed output appears after you run the primary action.
Features
- Live preview of colors
- 100% client-side conversion
- Copy values in multiple formats
How to use WCAG Color Contrast Checker
- Pick foreground and background colors, then review ratio and AA/AAA results.
Use cases
- Audit UI text
- Validate brand colors
- Improve accessibility
Technical reference
| Property | Supported |
|---|---|
| Input | Text or files accepted by WCAG Color Contrast Checker |
| Output | Transformed text, code, or downloadable result |
| Execution | 100% client-side in a modern browser |
| Account | Not required |
| Upload destination | None — Open local file stays in-browser |
| Output actions | Copy and download when available |
Common errors & troubleshooting
Empty or invalid input
Cause: Required input is missing or malformed for this tool.
Fix: Use Load example, then adjust the sample for your WCAG Color Contrast Checker task.
Browser storage or memory limits
Cause: Very large files may exceed what the tab can process smoothly.
Fix: Try a smaller sample, or split the work into chunks.
Privacy and security
- Your input and generated output are processed locally and are not sent to our servers for tool execution.
- Opening a local file uses the browser File API; the file is not uploaded to UtilityKit.
- We may collect anonymous product analytics (for example page views). Tool contents are not included in those events.
- WCAG Color Contrast Checker runs in your browser; extremely large inputs may be slow or limited by device memory.
- Results depend on your browser’s JavaScript engine and available APIs.
Frequently asked questions
Does the contrast checker support large text rules?
Verify text and background color pairs meet WCAG contrast requirements. Pick foreground and background colors, then review ratio and AA/AAA results. Nothing is uploaded.
Can I use this tool to audit ui text?
Yes. Common workflows include audit ui text, validate brand colors, improve accessibility.
Are color conversions accurate for print?
Browser conversions use standard sRGB math. CMYK values are approximate for screen-to-print previews, not ICC print profiles.
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