Paint Bucket Fill Online

See It in Action

Recolor one connected area at a time in flat artwork with clear boundaries; each fill uses a fixed color threshold.

Paint Bucket Tool example showing connected areas of a line-art illustration filled with color
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Connected-Area Fill
Click inside a region to replace connected neighboring pixels with your chosen solid color. Separate areas need separate clicks.
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Fixed Color Threshold
The fill includes neighboring pixels within a fixed RGB threshold of about 30 levels per channel; there is no tolerance slider.
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Review and Undo
Inspect the result after each fill. Undo a spill, then try a clearer enclosed area or repair the edge before filling again.

Tutorial Video

Watch how to upload an image, choose a color, fill enclosed areas, zoom in for small details, and undo mistakes.

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How to Use the Paint Bucket

The tool replaces connected neighboring pixels whose RGB channels are each within about 30 levels of the clicked pixel. This threshold is fixed; there is no tolerance slider. It does not identify objects or color an entire drawing automatically.

  1. Choose flat artwork. Enclosed regions in line art, icons, and illustrations usually give the most predictable fill.
  2. Select a fill color. Pick the solid color you want to use before clicking the image.
  3. Click and review each region. Fill connected areas one at a time. Undo a spill and inspect soft or broken boundaries.

Common Questions

Does the Paint Bucket color an image automatically?

No. You choose a fill color and click each connected area yourself. The tool does not recognize objects or decide which colors belong in an illustration.

Can I adjust the fill tolerance?

No. The current tool uses a fixed threshold of about 30 levels in each RGB channel; there is no tolerance slider.

Why did a fill stop short or cross an outline?

Antialiased edges, small gaps, or neighboring pixels with similar colors can affect where a connected fill stops. Use a clearly enclosed region, and undo and redraw if the fill leaks.

Is the Paint Bucket a good fit for photos?

It can replace connected patches of similar color, but textures, shadows, and gradients often make photo results uneven. It is intended for simple, flat-color regions rather than content-aware photo recoloring.

When Paint Bucket Fill Works Best

This tool is most predictable on flat illustrations, icons, and line art with closed boundaries. It fills connected pixels near the clicked color, so a gap or a soft, similar-colored edge can let the fill escape the intended region.

For cleaner results: click well inside the region rather than on its outline, zoom in for small areas, and fill separate regions individually. If the fill crosses a soft edge, undo it and repair or redraw that boundary before trying again.

The tool runs in your browser and applies a solid color; it does not infer object boundaries, pick colors for you, or recolor a photo based on its contents.