Blur Image
Apply Gaussian blur to your images for privacy or artistic effects
Drop an image here
Select an image to blur
Max file size: 20MB
100% Private: All processing happens in your browser. Your files never leave your device.
This tool applies the browser’s native canvas blur filter to a single image, with a slider running from 1px (barely noticeable) to 50px (heavily obscured). Drag the Blur Radius slider and the preview canvas redraws instantly at that strength; press Apply Blur & Download when you’re happy with the result to re-render it at full resolution.
The blur is applied to the entire image uniformly — there’s no face detection, no selective region, and no brush to paint blur onto just one area. To obscure a single face or license plate in a wider photo, you need to crop tightly to that area first (with /image/crop) and blur the cropped result, rather than expecting this tool to find and blur just that part of a full scene. It’s also worth knowing this tool doesn’t paint a background colour behind transparent pixels before exporting a non-PNG source as JPEG, unlike a couple of the other editors on this site — so a transparent WebP or GIF can come back with solid black where the transparency used to be.
How it works
1. Drop or browse an image
One file at a time, up to 20 MB, rejected at upload if larger.
2. Drag the Blur Radius slider
Ranges from 1px (subtle) to 50px (heavy), in 1px steps. The preview canvas updates live using the same blur(Npx) filter that’ll be applied to the final download.
3. Apply Blur & Download
Re-renders the blur at your image’s original resolution — the canvas is sized to the source image’s full width and height, not the smaller preview — then swaps the button for a download link.
4. Start Over if needed
Clears the loaded image and resets the slider back to its default of 5px.
When you'd use it
Redacting a face or plate before sharing
Crop tightly around the sensitive area first, then blur that cropped image, since Blur Image affects the whole frame rather than one spot within it.
A soft background for text or a banner
Blur an entire photo heavily to turn it into an unobtrusive backdrop you can lay a headline or logo over.
A shallow-depth-of-field look
Apply a moderate blur to an entire portrait or product shot to mimic the soft, out-of-focus feel of a wide-aperture lens photo.
A placeholder image that hides detail
Blur a full screenshot heavily so its general shape and layout stay visible while none of the text on it can be read — useful for a “coming soon” preview or a support illustration.
Why the blur covers the whole frame
The tool has one control — the radius slider — and one operation: it sets the canvas’s filter to blur(Npx) and draws your entire image through it in a single pass. There’s no mask, no selection rectangle, and no automated subject or face detection built in, so “blur just this face” isn’t something the tool can do on its own; you supply the selection yourself by cropping down to that region before you blur it.
A transparency caveat worth knowing
If your source file is exactly a PNG, the download stays a PNG and any transparency is preserved as-is. For every other format — JPG, WebP, GIF — the result is exported as JPEG, which has no transparency channel at all. Two of this site’s other image editors paint a white background behind transparent pixels first so that conversion doesn’t look broken; this tool doesn’t do that step, so if you blur a transparent WebP sticker or a GIF with see-through areas, expect those areas to come back solid black rather than white or see-through.
Frequently asked questions
Can I blur just one face in a group photo and leave the rest sharp?
Not directly — this tool blurs the entire image at once with no selection tool. Crop down to just the face or area you want obscured first, then blur that cropped image.
What blur strengths are available?
The slider runs from 1px, a barely-there softening, up to 50px, which turns most detail into an unrecognisable smear, adjustable in 1px steps.
Will a transparent image stay transparent after blurring?
Only if it’s a PNG. Any other format is exported as JPEG, and this tool doesn’t fill a background colour first, so previously transparent pixels can come out solid black.
Does blurring reduce my image’s resolution?
No. The final render happens at your original image’s full width and height — only the pixel content is softened, the dimensions are untouched.
How large a file can I blur?
Up to 20 MB per image, checked at the upload step before any blurring happens.