Image Blur Tool
Soften a photo, hide personal information, or make your subject stand out. Choose a smooth blur or pixelation, then apply it to the whole picture, to a box you draw, or to everything outside that box.
- Files stay on your device
- No sign-up
- Free to use
Drag the box over the area
Result
For privacy, pixelate or strongly blur faces, number plates and documents: a light blur can sometimes be partly reversed.
Effect
Apply to
The entire picture is blurred.
Output
How to use Image Blur Tool
- Drop an image onto the upload area or paste a screenshot.
- Choose Soft blur or Pixelate and set the strength.
- Choose what to blur: the whole image, a selected area, or everything except the selected area. Drag the box over the right spot.
- Select Blur image and download the result.
Image Blur Tool features
Blur or pixelate
A smooth Gaussian-style blur for a soft look, or blocky pixelation for clear, unmistakable censoring.
Selected area
Draw a box over a face, licence plate, email address or document number and blur only that.
Blur the background
Invert the selection to keep your subject sharp while everything around it softens, imitating a wide-aperture lens.
Strength that scales
The effect is defined relative to the image size, so the preview matches the full-resolution result.
Transparent images supported
Blurring respects transparency, so PNG logos and cut-outs keep clean edges.
Fully private
The image never leaves your device, which matters when the whole point is to hide sensitive details.
When to use Image Blur Tool
- Hiding faces of bystanders or children before posting photos publicly.
- Censoring licence plates, house numbers, addresses and account numbers in screenshots.
- Creating soft, out-of-focus backgrounds for text, slides and website hero images.
- Drawing attention to a product by blurring its surroundings.
- Preparing redacted screenshots for bug reports and support tickets.
Image Blur Tool FAQ
Is blurring safe for hiding sensitive information?
Strong pixelation or heavy blur is effective for faces and casual privacy. For text such as passwords, card numbers or ID numbers, a light blur can sometimes be partly reversed or guessed, so use high strength or pixelation with large blocks. For legal or highly sensitive documents, cover the area with a solid box instead.
What is the difference between blur and pixelate?
Blur spreads each pixel’s colour smoothly over its neighbours, producing a soft, out-of-focus look. Pixelate replaces blocks of pixels with their average colour, producing a mosaic. Pixelation is more obviously intentional and is the usual choice for censoring.
Can I blur more than one area?
Blur the first area and download the result, then upload that image again and blur the next area. Each pass keeps the previous edits.
Will blurring the background look like a real camera?
It gives a similar impression, but a lens blurs by distance, while this tool blurs everything outside your box equally. It works best when the subject sits inside a simple rectangle, such as a product on a table.
Is my photo uploaded?
No. The blur is calculated by your browser on your device. Nothing is sent to our servers.
How digital blur works, and when it protects privacy
A blur replaces every pixel with a weighted average of the pixels around it. The classic Gaussian blur weights nearby pixels most and distant pixels least, following a bell curve, which produces the natural look of an out-of-focus lens. Calculating that average for every pixel directly is slow, so this tool uses a well-known shortcut: three successive box blurs approximate a Gaussian blur closely while needing only a fraction of the work, even on large photos.
Pixelation takes a different approach. The image is divided into square blocks, and each block is filled with its average colour. Because large regions collapse to a single value, much more information is destroyed than with a gentle blur, which is why pixelation with big blocks is the safer choice for hiding details.
Blurring is not the same as deleting. Researchers have shown that lightly blurred or pixelated text can sometimes be reconstructed, particularly when the font and the set of possible characters are known, as with numbers on a card or a short code. Faces blurred only slightly may still be recognisable to people who know the person. When privacy really matters, use high strength, cover a generous area around the detail, and consider a solid black box for text.
Selective blur is also a creative tool. Photographers keep the subject sharp and let the background fall away to separate it from clutter. Blurring everything outside a box approximates that effect for product shots, portraits and presentation backgrounds where text needs a calm surface to sit on.