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Cartoon Effect

Flatten a photo into cartoon colours with bold outlines.

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Quick Tool Overview

The Cartoon Effect does the two things a cartoon actually is: flat areas of colour and dark outlines around them. Smoothing flattens the gradients, quantisation reduces the palette, and edge detection draws the lines back on top. The defaults start where it looks like a cartoon, not where it looks like a slightly odd photograph.

What it does
Flattens colours and adds bold outlines
You give it
A well-lit portrait or single subject
You get back
A cartoon-styled version
Best for
Avatars, illustrations and playful graphics
Image Tools Free, unlimited use No sign-up Runs in your browser

About the Cartoon Effect

A cartoon is two things at once: large areas of flat colour, and dark outlines around them. Reproducing that from a photograph means doing both — quantising the colours and detecting the edges — then putting the outlines back on top.

That is the pipeline here. Bilateral-style smoothing first, so the flat areas are genuinely flat rather than noisy; then colour reduction to a level you set; then edge detection drawn over the result at a weight you choose. The controls that make the difference are the colour count and the edge threshold, and the tool starts with the values that look most like a cartoon rather than the ones that look most like a photograph.

Key features of the Cartoon Effect

Smoothing then quantising

Flat areas are made genuinely flat before the palette is cut, which is what stops the result looking noisy.

Edge outlines on top

Detected edges are drawn over the flattened colour at a weight you set — the half that sells the effect.

Edge threshold

Raise it so background texture stops producing outlines where you do not want them.

No model, no upload

This is smoothing, quantisation and edge detection in your browser, not a service that has your photo.

Says what works

The page is direct that busy scenes fail and well-lit single subjects succeed.

How to use the Cartoon Effect

  1. 1

    Load the photo

    Portraits and clear single subjects work far better than busy scenes.

  2. 2

    Smooth the colours

    Enough that skin and background become flat areas rather than gradients.

  3. 3

    Reduce the colour count

    Eight to sixteen colours reads as cartoon; more reads as a slightly odd photograph.

  4. 4

    Set the outline weight

    Bold lines are what sell it. Raise the threshold if edges appear where you do not want them.

Frequently asked questions

Not enough colour reduction. A cartoon needs flat areas, which means eight to sixteen colours, not sixty-four. Raise the smoothing as well so gradients collapse.

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