Image Blur Tool

The Image Blur Tool applies a smooth, adjustable blur to any picture without sending it anywhere.

Drop in a JPEG, PNG, WebP or GIF and it is decoded and processed entirely inside your browser, with a slider that controls the blur radius and a live preview that updates as you drag.

Under the hood it runs a separable box blur — averaging each pixel with its neighbours in a square window — which produces a clean, even softening across the whole image.

A small radius takes the edge off noise or compression artefacts; a larger radius melts the picture into a soft wash that works well as a background, a privacy screen over text, or a placeholder while a sharper asset loads.

Because the tool always blurs a fresh copy of the original at the current radius rather than re-blurring an already-blurred result, dragging the slider back down restores detail exactly, with no smearing or stacked passes to worry about.

All of this happens locally with the Canvas API, so your images are never uploaded, stored or logged — safe for private photos, screenshots and client work — and the tool keeps running offline once the page has loaded.

When the blur looks right, download a lossless PNG of the result.