Blur Image Online — Free Photo Blur Tool
Apply a blur effect to any photo instantly. Adjust the blur radius from subtle softening to heavy blur — download the result as a JPG, free and browser-based.
✓ Free · ✓ No upload · ✓ Works offline in your browser
When to Use Image Blur
Blur is one of the most versatile tools in photo editing. Photographers use background blur (bokeh) to isolate subjects. Designers use blur to create depth and focus hierarchy. Privacy-conscious users blur out faces, license plates, or personal details in screenshots.
PhotoRule applies a Gaussian blur using the browser's native CSS filter API — the same algorithm used in professional image editors. The blur radius controls the spread of the effect in pixels.
Frequently Asked Questions
How do I blur an image online for free?
Upload your image, use the blur radius slider to set the intensity, and click Apply Blur. Download the blurred image as a JPG.
What is blur used for in photography?
Blur is used to simulate shallow depth of field (background blur/bokeh), hide sensitive information in screenshots, create motion blur effects, and produce artistic or dreamy photo effects.
Can I blur just the background?
This tool applies blur to the entire image. For selective background blur, you can use it as a starting point or combine with image editing software for masking.
What blur radius should I use?
2-5px for subtle softening, 10-15px for background blur simulation, 20-35px for strong blur effects, 50px for maximum blur that makes the image unrecognizable.
Is my photo sent to a server when I blur it?
No. PhotoRule uses the HTML Canvas API with CSS filter blur. All processing happens in your browser — your photo is never uploaded.