Gaussian Blur
Apply mathematically precise Gaussian smoothing with adjustable sigma for natural soft-focus effects — perfect for portrait backgrounds and artistic photography.
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JPG · PNG · WebP · GIF · BMP — Max 20 MB⚠ Please upload a valid image (JPG, PNG, WebP, GIF, BMP) under 20 MB.
Edge-Preserve Mode
Blur Background Only
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What is Image Blurring? How to Blur an Image Online
Image blurring is a widely used photo editing technique that softens pixels to create smooth, out-of-focus effects. Whether you want to blur a background, protect sensitive information, apply a Gaussian blur for a dreamy aesthetic, or pixelate a face for privacy, the right blur tool makes all the difference. Our free online blur image tool processes everything client-side — no data leaves your device. Simply upload any JPG, PNG, or WebP file, choose your blur type (Gaussian, radial, tilt-shift, or region-selective), adjust intensity, and download the result instantly. Best practices: use lower blur values for subtle depth-of-field effects and higher values for strong anonymisation or artistic pixelation.
Everything You Need to Blur Images
Professional-grade blur controls with real-time preview, privacy-first processing, and instant download.
Pixelate / Mosaic
Create retro-style mosaic effects or censor sensitive areas by converting image regions into large pixel blocks of adjustable size.
Selective Region Blur
Draw a rectangle on any part of your photo to apply blur only within that selection. Ideal for hiding faces, license plates, or confidential text.
Tilt-Shift Effect
Simulate miniature-scene photography with a focused horizontal band and blurred top/bottom zones for a dramatic depth-of-field effect.
Radial / Zoom Blur
Apply centred radial blur that increases in intensity toward the image edges, creating a dramatic zoom-burst or focus-pull effect.
Motion Blur
Add directional motion blur at any angle to convey speed and movement. Fine-tune the angle and distance for full creative control.
100% Private Processing
All blur operations run entirely in your browser via HTML5 Canvas. Your images are never uploaded to any server — complete privacy guaranteed.
Real-time Live Preview
See blur changes applied instantly as you drag sliders. No waiting, no processing spinners for interactive adjustments.
Multiple Export Formats
Download your blurred image as lossless PNG, compressed JPG with quality control, or modern WebP for optimal web performance.
Frequently Asked Questions
Everything you need to know about blurring images online.
How do I blur an image online for free?
Upload your image, select a blur type (Gaussian, Pixelate, Radial, Tilt-Shift, Region), adjust the intensity slider, preview the result live, and click Download. No sign-up required.
What is Gaussian blur and when should I use it?
Gaussian blur applies a bell-curve weighted smoothing kernel to pixels, producing a natural, even blur. Use it for softening portrait backgrounds, reducing image noise, or creating a depth-of-field look.
Can I blur only one part of an image?
Yes. Switch to the Region Blur tab, then drag a rectangle over the area you want to blur on the preview. Adjust the intensity and download the result with only that region blurred.
Is my image uploaded to a server?
No. All processing happens entirely in your browser using the HTML5 Canvas API. Your images never leave your device, making this tool completely private.
What file formats are supported?
You can upload JPG, PNG, WebP, GIF, and BMP images up to 20 MB. You can export the blurred result as PNG, JPG, or WebP with adjustable quality.
What is tilt-shift blur?
Tilt-shift blur keeps a horizontal band of the image in sharp focus while blurring the top and bottom sections progressively. It mimics the look of tilt-shift lens photography or makes real scenes look like miniature models.
Does the tool work on mobile phones?
Yes. The Blur Image tool is fully responsive and tested on iOS and Android. You can upload, edit, and download blurred images entirely from your smartphone browser.
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