Home › Image tools › Blur Image

Blur Image

Blur an image with an adjustable Gaussian blur radius using the free online blur tool. It softens a photo instantly and privately, entirely in your browser.

Choose an image

Blur 4px

What is Image Blur?

Blurring an image softens its detail by averaging the colour of each pixel with its neighbours, weighted by a bell-shaped curve that emphasises closer pixels. The wider the radius, the further the blur reaches and the smoother the result. This tool applies a genuine Gaussian blur — the smooth, natural softening used in most photo editors — rather than a posterising filter. It is a multipurpose effect. Designers blur photos to build hero-section backdrops that keep their mood without fighting over foreground text. Photographers blur a background to create a depth-of-field look. And anyone about to share a screenshot or a photo blurs out a face, an address or a license plate so sensitive detail becomes unreadable. The image is drawn to a canvas in your browser and the blur is computed on your own device, so nothing is uploaded, no account is needed and the export keeps the original resolution.

How to use Image Blur

Choose an image file from your device.
Drag the blur slider to set the strength of the Gaussian blur.
Watch the live preview update as you move the slider.
Click Download to save the blurred image.

Example

A screenshot with a visible name and address — blur radius set to 12px. The preview softens the text until it is no longer readable; Download saves the same blurred version at full resolution. Small values of 2–5px give a subtle softening, while 15–30px create a pronounced glass-like blur.

Who is this blur image tool for?

Creators and photographers: They soften portraits and backgrounds for a smooth, lens-style depth-of-field look.
Designers: They blur a backdrop so a headline or product pops in the foreground.
Marketers: They hide sensitive text, addresses or licence plates before publishing a post.
Developers: They blur an image locally to produce a privacy-protected thumbnail before it is shown.

Blur radius reference

Radius (px)	Intensity	Typical use
1–2	Subtle	Soften skin, lens soft-focus
5	Moderate	Bokeh-style background
10	Heavy	Hide text / sensitive data
20	Extreme	Artistic wash-out

Common use cases

Softening a background so foreground text or a subject stands out.
Hiding a face, address or license plate before you share an image.
Creating a depth-of-field or dreamy look for portraits and product shots.
Generating a blurred placeholder while a larger image loads.

Pro tips

Keep pushing the radius until the detail you want hidden is genuinely unreadable.
Blur a copy, not your original, so the sharp version always survives.
For masking text, test the result zoomed in — a low blur can leave shapes recognisable.

FAQ

How do I blur an image?

Choose an image, drag the blur slider to set the strength, and download the blurred result instantly.

Is it free and private?

Yes. It is free, unlimited, and runs entirely in your browser so your images never leave your device.

Can I see the blur before I download?

Yes — a live preview updates in real time as you move the slider.

What is a Gaussian blur?

It averages the colour of each pixel with its neighbours, weighted by a bell curve, to produce a smooth natural softness.

How much blur do I need?

For a subtle soften use a small radius; to hide text or a face keep pushing the radius until it is unreadable.

Does it change the image resolution?

No. The blurred export keeps the original resolution and qualities.

Why blur a background?

A blurred backdrop keeps its mood without competing with foreground text or a subject.

Is my image uploaded?

No. It is drawn to a canvas in your browser and never sent to a server.