Question 1

What blur method does this tool use?

Accepted Answer

The tool uses the CSS filter 'blur()' applied to a Canvas 2D context. This is a Gaussian blur algorithm built into the browser, which produces smooth, natural-looking results. The blur radius is measured in pixels.

Question 2

What is the difference between 1px and 20px blur?

Accepted Answer

1px is a subtle softening effect. It smooths sharp edges slightly without being noticeable at a glance. 20px is a heavy blur that makes the image look very out of focus. Values between 5-10px are good for hiding text in screenshots while still revealing the general layout.

Question 3

Does blurring reduce image quality?

Accepted Answer

Blurring does not reduce resolution, but it does remove detail by design. For PNG and WEBP, there is no additional quality loss beyond the blur effect. JPG output is re-encoded at 92% quality. The blur is applied at the full native resolution of your image.

Question 4

Can I blur just part of an image?

Accepted Answer

This tool applies blur to the entire image. If you only need to blur a specific region, you can crop that region first using the Crop Image tool, blur it, then combine the images manually.

Question 5

Is my image uploaded to a server?

Accepted Answer

No. The blur runs entirely in your browser using the Canvas API. Your image never leaves your device. No uploads, no account required.

Blur Image

When to use this

Hide sensitive info

Background blur

Artistic effect

Free image blur tool, runs in your browser

Quick answers

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