Drop image here or click to upload
Supports JPG, PNG, GIF, WebP — processed entirely in your browser
// add gaussian blur with adjustable intensity
Add Gaussian blur to any image online — free, browser-based, no upload required. Adjust blur intensity with a live preview slider and download the result instantly.
Drop image here or click to upload
Supports JPG, PNG, GIF, WebP — processed entirely in your browser
Click "Choose Image" or drag and drop any JPG, PNG, GIF, or WebP file onto the upload zone.
Drag the Blur Intensity slider from 0px to 50px. The blurred preview updates in real time.
Choose your output format (PNG, JPEG, or WebP) and click Download to save your blurred image.
This Image Blur Tool applies Gaussian, Box, or Motion blur directly in your browser using the HTML5 Canvas API. No data is uploaded to any server — your image stays completely private on your device.
The blur radius controls how many pixels are averaged together. Higher values create a stronger, dreamier blur effect.
No. This tool processes everything entirely in your browser using the HTML5 Canvas API. Your image never leaves your device and is never sent to any server.
Three blur types are supported: Gaussian (smooth, natural-looking blur), Box (uniform square averaging), and Motion (directional blur that simulates camera motion).
You can upload JPG, PNG, GIF, and WebP images. Output can be downloaded in PNG, JPEG, or WebP format depending on your selection.
There is no server-side limit since processing is local. Very large images (above 20–30MB) may be slow depending on your device's CPU speed and available RAM.
This tool applies blur to the entire image. For selective/region-based blurring, consider using a dedicated image editor like Photoshop, GIMP, or Canva.
Gaussian blur uses a weighted average that follows a bell-curve distribution, producing soft, natural edges. Box blur uses a simple uniform average across a square area, which can look slightly blocky at high radii.
For a frosted glass look, values between 8px and 20px typically work well. Pair with a slight reduction in saturation for a more authentic result.
Yes. The tool works on any modern mobile browser. Tap "Choose Image" to open your camera roll or file picker. Very large images may process more slowly on mobile devices.
A Gaussian image blur tool applies a mathematical smoothing operation to a digital image, reducing sharpness and detail in a way that mimics natural out-of-focus blur. The Gaussian function creates a weighted average of each pixel and its neighbors, where nearby pixels contribute more than distant ones — resulting in smooth, natural-looking softness rather than blocky artifacts.
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Gaussian blur is named after mathematician Carl Friedrich Gauss. The algorithm convolves the image with a Gaussian kernel — a matrix of values derived from the Gaussian (normal) distribution formula. The radius (or sigma) of the blur controls how wide the kernel is and therefore how strong the effect appears.
For each output pixel, the algorithm samples a neighborhood of input pixels, multiplies each by its corresponding kernel weight, then sums the results. Pixels close to the center contribute more to the output than those on the edges of the kernel, which is what gives Gaussian blur its characteristic smooth falloff.
Not all blur is created equal. Here is a comparison of the three types available in this tool:
filter: blur()), and image processing software. The smooth, weighted averaging prevents banding and ring artifacts.Image blur is one of the most versatile effects in visual design and content creation. Some of the most frequent use cases include:
This tool uses the HTML5 Canvas API to process your image entirely within your web browser. When you load an image, it is drawn onto an offscreen canvas element. The blur algorithm then reads the pixel data using getImageData(), applies the convolution kernel, and writes the result back with putImageData(). The blurred canvas is then displayed in the preview and can be exported using canvas.toDataURL().
Because everything happens locally using JavaScript and Canvas, no image data is ever transmitted to a server. This makes it safe to use with confidential images, personal photos, and sensitive documents.
The blur intensity (radius) you choose depends on your use case:
After applying blur, you can download the result in three formats. PNG is a lossless format best for images that require transparency or pixel-perfect quality. JPEG uses lossy compression, producing smaller file sizes — ideal for web photos where some quality reduction is acceptable. WebP is a modern format developed by Google that combines excellent compression efficiency with support for transparency, making it the best choice for most web-use scenarios where browser compatibility is not a concern.