Question 1

How do you count unique colors in an image?

Accepted Answer

The tool reads every pixel of the image using a canvas, then counts the occurrences of each RGB color combination. You can also group similar colors using a tolerance slider, which combines near-identical shades into a single bucket to reduce noise.

Question 2

What is color tolerance?

Accepted Answer

Tolerance collapses near-identical colors into one bucket. A tolerance of 0 treats every distinct RGB triplet as unique, while higher values (e.g. 16) merge colors that are within ±16 units of each other in each channel. Useful for JPEG/photo compression artifacts.

Question 3

Is my image uploaded to a server?

Accepted Answer

No. All processing happens locally in your browser using the HTML5 Canvas API. Your image never leaves your device.

Question 4

What image formats are supported?

Accepted Answer

Any format your browser can decode in an Image element — JPG, PNG, WebP, GIF, BMP, AVIF, ICO, SVG (rasterized) and more.