Blur Image Tool
Apply an adjustable Gaussian blur to a whole image, right in your browser.
Select or Drag Image
Secure local processing for US design standards
This tool applies a Gaussian blur across your whole image, with a slider that sets how strong the effect is. Blur is handy for softening a busy background, making a picture usable as a text backdrop, or creating a frosted, out-of-focus look. The image is drawn to a canvas and blurred in your browser, so it is never uploaded.
What the blur radius actually means
The slider controls the blur radius in pixels — roughly how far each pixel's colour is spread into its neighbours. A small radius takes the edge off noise and fine texture; a large radius dissolves the picture into soft colour blobs. Because it is measured in pixels, the same setting looks stronger on a small image than on a large one, so nudge the slider to taste rather than trusting a fixed number.
Blur hides detail, it does not securely erase it
People often blur faces, licence plates or text to redact them. Be careful: a light blur can sometimes be partially reversed, and even a moderate one can leave recognisable shapes. If you are hiding something sensitive, blur it heavily — or better, paint a solid block over it before exporting. Blur is a visual softening effect, not a guaranteed way to destroy information.
Frequently Asked Questions
What does the slider control?
The blur radius in pixels — how far each pixel bleeds into its neighbours. Higher values give a stronger, softer blur.
Is blurring a safe way to redact faces or text?
Only if it is heavy. A light blur can leave recognisable shapes and is sometimes partly reversible. For truly sensitive information, use a strong blur or cover the area with a solid shape.
Can I blur just one part of the image?
This tool blurs the whole image evenly. To blur only a region, crop that part out, blur it, and composite it back in an image editor.
Is my image uploaded?
No. The blur is applied on a canvas in your browser and the result is downloaded locally.