Blur Image
Apply Gaussian blur to any image online for free. Adjust blur radius with a slider, use quick presets, and compare before and after. Download as PNG or JPG.
Drop an image here or click to upload
PNG, JPG, WebP, or any image format
How to Blur an Image Online
Upload any image and adjust the blur radius slider to apply a smooth Gaussian blur. The preview updates in real time. A small radius adds a subtle softness, while a large radius creates a strong, dreamy effect that obscures all detail. Download the result as PNG or JPG.
Gaussian blur works by averaging each pixel with its neighbours using a bell-curve weighting. Nearby pixels have the most influence, and the effect falls off with distance. This produces a natural, smooth blur that looks like genuine optical defocus rather than a flat smear.
Blur Radius Guide
| Radius | Effect | Best For |
|---|---|---|
| 1-3px | Very subtle softening | Skin smoothing, reducing noise |
| 4-7px | Noticeable soft focus | Gentle background blur, portrait backgrounds |
| 8-12px | Strong blur | Privacy censoring, depth of field simulation |
| 13-15px | Extreme blur | Abstract backgrounds, text overlay backgrounds |
Common Uses for Image Blurring
Privacy is the top use, blurring faces, number plates, addresses, or screen content before sharing screenshots and photos online. Designers blur images to create soft backgrounds for text overlays, hero sections, and presentation slides. Photographers use selective blur to simulate depth of field.
Blurred images also make excellent wallpapers and gradient-like backgrounds. A heavily blurred landscape photo produces a smooth, colourful background that feels organic. Web designers use blurred hero images behind text to keep the page visually interesting without competing with the content.
Blur vs Pixelation
Blur and pixelation both obscure detail, but they look very different. Blur produces a smooth, continuous softening where shapes blend into each other. Pixelation creates hard-edged square blocks. Blur looks more natural and is better for backgrounds and artistic effects. Pixelation is more commonly used for censoring because the blocky look clearly signals that something has been intentionally hidden.
For privacy purposes, both methods work. Pixelation is slightly more secure because blur can sometimes be partially reversed with AI deblurring tools, while pixelation permanently destroys the underlying data.
Frequently Asked Questions
Can a blurred image be unblurred?
Partially. AI deblurring tools can recover some detail from lightly blurred images, especially if the blur radius is small. For privacy-sensitive content, use a large blur radius (10+) or consider pixelation instead, which is harder to reverse. Heavy blur destroys enough information to be practically irreversible.
What is Gaussian blur?
Gaussian blur is the most common blur algorithm. It averages each pixel with its surrounding pixels using a Gaussian (bell curve) distribution, giving more weight to nearby pixels and less to distant ones. The result is a natural-looking, smooth blur. The 'radius' controls how many surrounding pixels are included in the average.
Is this processed on my device?
Yes. All blurring happens in your browser using the HTML Canvas API. Your images are never uploaded to any server.
Related Tools
Sharpen Image
Sharpen blurry or soft images online using unsharp mask technology. Adjust strength, compare before and after, and download the sharpened result.
Pixelate Image
Pixelate any image online for free. Adjust pixel block size to control the effect. Perfect for censoring faces, hiding details or creating retro pixel art effects.
Photo Filter Tool
Apply filters to your photos right in the browser. Adjust brightness, contrast, saturation, blur, and more. Quick presets and before/after comparison.
Reduce Image Quality
Intentionally reduce image quality with pixelation, blur, noise, JPEG artifacts, and colour reduction effects. Create lo-fi, VHS, or deep fried meme looks.
Related Tools
Sharpen Image
Sharpen blurry or soft images online using unsharp mask technology. Adjust strength, compare before and after, and download the sharpened result.
🎨 Creative & DesignPixelate Image
Pixelate any image online for free. Adjust pixel block size to control the effect. Perfect for censoring faces, hiding details or creating retro pixel art effects.
🎨 Creative & DesignPhoto Filter Tool
Apply filters to your photos right in the browser. Adjust brightness, contrast, saturation, blur, and more. Quick presets and before/after comparison.
🎨 Creative & DesignReduce Image Quality
Intentionally reduce image quality with pixelation, blur, noise, JPEG artifacts, and colour reduction effects. Create lo-fi, VHS, or deep fried meme looks.
🎨 Creative & Design