Image Blur
Apply Gaussian blur to any image with our free online blur tool. Adjust the blur intensity with the sigma slider for soft focus effects, background blur, or privacy protection. Perfect for creating professional-looking images with depth and focus.
Frequently asked questions
How do I blur an image online?
Simply upload your image, adjust the sigma slider to control the blur intensity, and click Apply Blur. Higher sigma values create stronger blur effects. You can preview the results in real-time before downloading.
What is Gaussian blur?
Gaussian blur is a smooth, natural-looking blur effect that uses a mathematical formula to blend pixels. It's commonly used in photography and graphic design to create soft focus effects, reduce noise, or blur backgrounds.
What file formats are supported?
Our blur tool supports all major image formats including JPG, PNG, WebP, GIF, and more. The output format will match your input format to preserve quality.
Can I blur only part of an image?
This tool applies blur uniformly across the entire image. For selective blurring, you may want to crop the specific area first, apply blur, then combine the images using an image editing tool.
Is there a limit to image size?
Our tool can handle images of various sizes, though very large images may take longer to process. For best performance, we recommend images under 10MB.
Is my image data private?
Yes, all image processing happens securely and your images are not stored on our servers. Your files are processed and immediately discarded after download.
What sigma value should I use for different blur effects?
For subtle soft focus, use sigma values of 1-3. For moderate background blur, try 5-10. For strong blur effects or privacy protection, use 15-30. For extreme blur, go above 30. Start low and increase gradually to achieve your desired effect.
Will blurring reduce my image quality?
Blurring intentionally softens details, but the resolution and overall image quality remain intact. The blur effect is applied mathematically without degrading the underlying image data. Your blurred image will maintain the same dimensions and file characteristics as the original.
Can I use blur to protect privacy in photos?
Yes, applying strong blur (sigma 20-40) is an effective way to obscure faces, license plates, addresses, or other sensitive information in photos before sharing them online. Make sure the blur is strong enough that details cannot be recovered or enhanced.
How is Gaussian blur used in professional photography and design?
Professionals use Gaussian blur to create depth of field effects, simulate bokeh backgrounds, reduce digital noise, soften skin in portraits, create dreamy atmospheres, prepare backgrounds for text overlays, and add emphasis to foreground subjects. It's a versatile tool for creative image manipulation.