Blur Image
Smooth an image with a box blur to soften detail, reduce noise, or create a subtle diffusion effect.
How it works
- 1
Drop your image onto the upload area and drag the radius slider. A small radius subtly softens the image; a large radius produces a strong, dreamy blur.
- 2
The blur runs three passes to approximate a smooth Gaussian result rather than a blocky average.
- 3
Click Blur image to download the result as a PNG.
Questions
Which radius should I use?
Radius 1–3 removes fine noise while keeping edges sharp. Radius 10–20 creates a visible soft-focus look. Above 30 the image becomes heavily diffused.
Why does the output file become a PNG?
PNG is a lossless format, so the blur effect is saved exactly without adding JPEG compression artefacts on top of it. For most images PNG is the right choice after a pixel-level transformation.
Does my image leave my device?
No. All processing runs entirely in your browser. The image is never sent anywhere.
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