RGB to LAB Converter
Convert RGB color values to CIELAB (L*a*b*) color space instantly
L* (Lightness): 0
a* (Green–Red): 0
b* (Blue–Yellow): 0
About RGB to LAB Converter
CIELAB (L*a*b*) is a perceptually uniform color space defined by the International Commission on Illumination. L* represents lightness (0–100), a* encodes the green-to-red axis, and b* encodes the blue-to-yellow axis. LAB is device-independent, making it ideal for color science, image processing, and accurate color matching across different media. This tool converts sRGB values via the XYZ color space using the D65 illuminant. All calculations run locally in your browser.
- 100% free — no account needed
- Runs in your browser
- Nothing is uploaded
Frequently asked questions
Is RGB to LAB really free?
Yes. RGB to LAB is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.
Does RGB to LAB upload my data?
No. RGB to LAB runs entirely inside your browser, so anything you type, paste, or open stays on your own device.
Do I need to sign up or install anything?
Neither. There is no account and nothing to download — open the page and RGB to LAB is ready to use on desktop or mobile.
Does RGB to LAB work offline?
Once the page has loaded, yes. All of the processing happens locally in your browser, so it keeps working without a connection.
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