Blur Image
Softness On Demand
Gaussian blur from subtle softening to complete abstraction. Privacy protection, background treatment, and dreamy effects - radius under your control.
Blur parameters
- Radius range1 - 40 px
- AlgorithmGaussian
- FormatsJPG / PNG
- PreviewImmediate
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Different jobs, same file here's what people use alongside this tool.
How to blur an image
- 01Upload your imageScreenshots, documents, portraits - whatever needs softening.
- 02Set blur radiusLow values soften; high values abstract completely.
- 03Download the blurred copySmooth gradients, protected details, artistic softness.
Features
True Gaussian falloff
The industry-standard algorithm produces natural-looking softness.
Wide radius range
From barely-there softening to total abstraction in one slider.
Privacy-grade protection
Sufficient radii make text and faces unrecoverable.
Edge-aware smoothness
Gradients blend without banding artifacts.
Format selection
JPG or PNG output as needed.
Hardware acceleration
GPU filters process large images without waiting.
Reasons to blur
Blur's many jobs
Privacy engineering
Faces, addresses, and credentials deserve obliteration before sharing.
Visual hierarchy
Blurred backgrounds push foreground subjects forward.
Imperfection concealment
Distracting elements soften into irrelevance.
Atmosphere creation
Strategic blur suggests depth cameras didn't capture.
How much blur is enough to hide information?
Blur hides information by destroying spatial frequency detail, but destruction is proportional to radius. Light blur frustrates casual reading while leaving determined reconstruction possible - research has demonstrated recovery of blurred text through deconvolution when radii are small relative to character size.
Effective privacy blurring follows a ratio rule: radius should exceed feature size. License plate characters need roughly their own height in blur radius; faces need enough softening that identifying structures - eye spacing, distinctive features - dissolve into smooth regions.
For genuinely sensitive material, consider whether blur suffices at all. Pixelation at aggressive block sizes, or outright cropping, destroys information more thoroughly than any reversible-filter-resistant blur. Blur excels for casual protection; high-stakes secrecy demands stronger measures.
“Student information in classroom photos gets blurred before newsletter distribution - parents appreciate the care.”
Derek Cho - Teacher
“Source protection means blurring faces and documents thoroughly. Better safe than identifiable.”
Marta Kowalska - Journalist
“Background blur behind mockups creates depth that flat presentations lacked.”
Ben Osei - Product designer
Frequently asked questions
What blur radius should I use?
Depends on purpose: 2-4px softens gently, 8-15px obscures text, 20px+ creates abstraction. Privacy uses need radius exceeding the hidden feature's size.
Is blurred information truly hidden?
At sufficient radii, effectively yes. Small radii leave theoretical reconstruction possibilities - use generous blur for sensitive content.
Can I blur only part of an image?
This tool blurs entire images. For selective regions, blur the full image elsewhere or crop the sensitive area first.
Does blur reduce file size?
Usually yes - smoothed gradients compress far more efficiently than sharp detail.
What's Gaussian about it?
The algorithm weights neighboring pixels by a bell curve, producing the natural softness cinematography and photography standardized on.
Is processing local?
Completely - GPU-accelerated filters run in your browser.