Eraser Tool

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Online App (Beta)
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drop button
Selection history
eraser tool icon
Size: Blur: Opacity:
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About the Image Eraser Tool

The eraser tool operates in much the same way as the brush tool but instead of changing the pixels in its stroke to a selected color it erases the pixels to transparent. To use the eraser you click and drag in the image to erase pixels within the eraser stroke. It is useful in compositing as it is used to clear or erase an area in a layer so that the contents of the layer below can be seen. The eraser tool is often used in combination with selection tools to restrict erasing to an area that defines an object in the layer or image. Upload an image from your computer or use a sample image to try the eraser tool.
Eraser tool main example

Using the Online Eraser Tool

  • Upload an image using the form above.
  • Press and drag in the image to erase areas using the eraser tool strokes.
  • Adjust the settings in the tool options bar to set the size of the eraser tool, its' hardness and opacity.

How the Eraser Tool Works

The cursor for the eraser tool is a circle which has a diameter set by the Size setting in the tool options bar. Changing the 'Size' setting also changes the diameter of the brush cursor circle.

eraser tool size setting

The cursor circle indicates the area that will be erased when you click or drag in the image with the eraser tool. In the pair of images below the first image shows the mouse over the image in the editor. The second image shows a single click in the image with the erase tool clearing the area covered by the eraser brush.

eraser tool cursor

The Blur setting in the tool option is used to soften the eraser strokes. The more you increase the blur the more the eraser will appear to spread the eraser stroke. The blur softens the transition between the erased and un-erased areas at the border of a stroke.

eraser tool blur setting

Below shows an image with two eraser strokes. The stroke at the top has 0 or no blur, hence the sharp edges. The stroke below it has a blur of 5 pixels.

eraser tool blur

The erase tool does not have to completely erase at all times to fully transparent. You can set the Opacity in the tool options to set the strength of the eraser tool.

eraser tool opacity setting

A value of 100, the default value, will erase completely, 50 will make the image semi-transparent and 0 opacity will make the eraser tool have no effect on the image. The image below illustrates the effects of opacity on the eraser. The opacity values are 20, 50 and 100 starting with the stroke at the top.

eraser tool opacity

Eraser Tool Options

  • Size:
    Sets the diameter of the brush strokes for the eraser tool.
  • Blur:
    Sets what would be called the 'hardness' in other editors such as photoshop or gimp. The blur makes the edge of the eraser brush stroke less sharp or fuzzy.
  • Opacity:
    The opacity sets how much the eraser tool erases in the image. A value of 100% means the eraser is at full strength and erases completely while an opacity of 0% means the eraser stroke is invisible and will not erase in the image.

Feature Rich Online Image Editor

Online photo editing with layers, layer masks, a workflow and user interface like a traditional desktop photo editor that provides you with the toolset and features to professionally edit your images. No need to download or use desktop software like Microsoft Paint, Photoshop or GIMP to do quick edits. Edit your images online with the best online image editor.
Features Gifgit Editor Lunapic
Browser based editing (No software download) Yes Yes
Layers Yes No
Layer Masks (Non-Destructive Editing) Yes No
Selection tools Yes No
Undo History List Yes No
Export Formats Supported: JPEG, PNG