How to use the Hex Color Validator
- Paste or upload your text. Type, paste or upload a .txt file into the input box.
- Pick options. No options needed — the tool runs instantly.
- See the result instantly. The output updates live as you type.
- Copy or download. Use Copy to clipboard or Download to save the result.
About this tool
HEX, RGB, HSL, CMYK converters, palettes, contrast checker and CSS generators.
Read the complete Hex Color Validator guide
Frequently asked questions
Is the Hex Color Validator free to use?
Yes. The Hex Color Validator on Gemma-4 is 100% free with no sign-up, no limits and no watermark. An optional free account lets you save favourites.
Is my data private?
Yes. Your inputs are processed instantly and are not stored on our servers.
Does it work on mobile phones?
Absolutely. The Hex Color Validator is fully responsive and works on Android, iPhone, tablets and desktop browsers such as Chrome, Edge, Safari and Firefox.
Is there a limit on text length?
You can process very large texts (several megabytes). Extremely large inputs may take a moment depending on your device.
Who is the Hex Color Validator useful for?
It is popular with web and UI designers, graphic designers, front-end developers — anyone who needs quick, reliable help with colour conversion, accessibility and CSS design.