Blur Image
Apply a smooth Gaussian blur by any amount.
Runs in your browser, nothing is uploadedFree, no signupNo watermark
Drop an image here
or click to choose one. It never leaves your device.
Before and after
See what changes
OriginalBlurredDrag the handle across the image. The right-hand side is this tool's output, not a mock-up of it.
- Before
- Original
- After
- Blurred
Three steps
How to use the blur image
- 01
Add an image
Drop in the photo you want softened.
- 02
Move the blur slider
The preview updates as you drag, from a barely-there softening to a full wash of colour.
- 03
Download the result
The blur is baked into the pixels, so it travels with the file.
Why this one
What makes it different
A true Gaussian blur
A proper Gaussian falloff rather than a box average, which is the difference between a soft image and a smeared one.
Live preview at full size
Blur radius is impossible to judge from a number, so the preview shows the actual result rather than a thumbnail approximation.
Baked in, not CSS
A blur applied in a stylesheet vanishes the moment the image is used elsewhere. This one is in the file.
How this tool handles your files
- Where it runs
- Your browser, not a server
- Uploads
- None, ever
- Account
- Not required
- Watermark
- Never added
The short version
About blur image
Blur has two completely different uses that people reach for it in equal measure. One is aesthetic, turning a photograph into a soft background so text on top of it stays readable. The other is concealment, and for that it is the wrong tool: a blur smears information rather than destroying it, which is why anything genuinely sensitive wants pixelation at a coarse block size instead.
Questions
Blur Image FAQ
How do I blur a background but keep the subject sharp?
That needs a selection, which this tool does not do. Crop the subject out, blur the full image, then place the sharp subject back over it with the collage tool.
Is blurring enough to hide sensitive information?
Not reliably. A light blur on text can sometimes be reversed. For anything genuinely private, like an address or a licence plate, use the pixelate tool at a large block size, which destroys the information rather than smearing it.
What blur radius should I use?
Two to five pixels reads as a gentle softening. Twenty and above turns the image into a colour wash suitable for a background behind text.
Does blurring change the file size?
Usually it shrinks it. Blurring removes high-frequency detail, which is exactly what compression struggles with, so a blurred image compresses better than a sharp one.
Free, and staying free
The tools are free because the icons are the business.
Thridy is a library of thousands of 3D icons in one consistent style, free for commercial use with no attribution and no account. The tools exist so you never have to upload an image to somebody else's server to resize it.
Keep going
More image tools
Pixelate Image
Pixelate an image or hide part of it in blocks.
Sharpen Image
Bring out edges and detail with a sharpen pass.
Brightness
Brighten or darken an image.
Contrast
Increase or soften the contrast of an image.
Saturation
Make colours richer or more muted.
Grayscale
Convert an image to black and white.