How does the 'Selective Blur (Brush)' work?

When you select this mode, you can use your mouse (or finger on touch devices) like a brush to paint over the areas of the image you want to blur. The 'Blur Amount' slider controls how blurry those brushed areas become, and the 'Brush Size' slider controls the diameter of your brush.

Can I 'unblur' areas I've brushed over in selective mode?

Currently, this tool doesn't have an 'eraser' brush for the selective blur. However, you can click the 'Clear Blur Mask' button to remove all brushed blur areas and start painting the blur again. For precise unblurring, you would need more advanced photo editing software.

What kind of blur is applied by this online blur tool?

This tool typically applies a Gaussian-like blur effect using browser canvas filters. The 'Blur Amount' slider generally controls the radius or intensity of this blur, resulting in a smooth, natural-looking softening of the image.

Are my images uploaded to a server when I use this blur image online free tool?

No, all image processing for this blur tool is performed client-side within your browser using the HTML Canvas API. Your images are not sent to any external server, ensuring your privacy.

What's the maximum blur amount or brush size I can apply?

The sliders provide a practical range for blur amount and brush size (e.g., blur up to 30px, brush up to 100px). Applying very high blur amounts can make image details entirely unrecognizable. Experiment to find what works best for your image.