Color Contrast Checker
Check WCAG contrast ratios between two colors.
- On your device
- No signup
Private on your device
Your information stays on your device and is not uploaded.
Check WCAG contrast ratios between two colors.
Format, minify, and validate JSON with optional key sorting.
Compare two JSON documents and list structural differences.
Format, minify, and validate XML with readable indentation.
Compare two XML documents and list structural differences.
Encode and decode text with Base64.
Decode JWT header, payload, and expiry—including Bearer tokens—on your device.
Generate UUIDs for apps, tests, and databases.
Enter a color as HEX, RGB, HSL, or HSV to convert between formats. Conversions run on your device.
1. Paste or type input into the Color Converter editor. 2. Adjust format, mode, or option controls if shown. 3. Review live output or validation messages from Color Converter. 4. Fix any reported errors. 5. Copy the result when it looks correct. Processing runs on your device; inputs are not uploaded to our server.
Example: paste a small sample input into Color Converter, run the transform or validation, and compare the output with the before text—fix any syntax errors reported before copying.
Enter a color as HEX, RGB, HSL, or HSV to convert between formats. Conversions run on your device.
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
Your image stays on your device and is not uploaded.
FAQ
HEX, RGB, HSL, and HSV.
No. Everything stays on your device.
Yes. Utilnivo tools are free to use and do not require an account.
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