Blur an Image Online
Soften a face, a background, or a sensitive detail with an adjustable blur — free and right in your browser.
拖入图片以开始模糊处理
拖放、粘贴或选择文件
PNG · JPG · WebP · GIF · BMP — 在您的设备上处理
Why blur an image?
Blurring is the gentle way to hide something in a photo. A soft blur over a face, a house number, or a name in the background keeps the overall picture looking natural while making the obscured part unreadable. It's perfect for sharing a screenshot or holiday photo without exposing strangers, addresses, or private notes.
This tool uses a true Gaussian-style blur with a strength slider, so you control exactly how much detail disappears. You can blur the whole image at once or drag a box over just the part you want to soften — everything else stays sharp and full-resolution.
How to blur an image
- Open your image. Drag a photo onto the tool above, choose a file, or paste from your clipboard.
- Pick what to blur. Choose Selected areas and drag a box over each part to hide, or switch to Whole image to soften everything.
- Set the strength. Slide the blur strength up until the detail is gone, then download in your original format.
Blur enough to truly hide
A light blur can sometimes be reversed by software. If the detail is genuinely sensitive — a face you must not reveal, an account number — push the strength high, or use the Redact bars to paint over it completely.
blur image的原理
- 它的作用
- 可调节的高斯风格模糊
- 工具如何实现
- 本工具对所选像素执行三次可分离的盒式模糊，非常接近真正的高斯模糊，并对边缘做钳制处理，因此柔化效果绝不会溢出到你的方框之外。
- 用途
- 柔和模糊非常适合在分享前让背景中的人脸、门牌号、路牌或屏幕上的名字变得无法辨认，同时保持照片自然的观感。
- 能否还原？
- 模糊是对底层像素取平均而非删除，因此轻度模糊有时可被软件部分还原——对任何真正敏感的内容请把强度调到很高。
提示： 把强度往上调，直到全屏放大时你确实辨认不出细节；如果还能隐约读出，那它就还没被隐藏。
More ways to blur & hide
常见问题
How do I blur just part of an image?
Choose Selected areas and drag a rectangle over the part you want to hide. Add as many boxes as you need; the rest of the image stays sharp.
Is a blurred area really hidden?
A strong blur makes a face or text unreadable. For information that must never be recovered, use a very high strength or switch to the Redact (solid bar) mode.
Does blurring lose quality elsewhere?
No. Only the blurred area changes; the rest of the image stays at full resolution. The blur is baked in when you download.
Where is my image processed?
The blurring happens in your browser, so the new file is created on your own device. How any data associated with the tool is handled is described in our privacy policy.
更多图片工具
Crop an image
Crop to any ratio or an exact pixel size.
Image toolResize an image
Change dimensions to exact pixels or presets.
Image toolCompress an image
Shrink file size without visible quality loss.
Image toolRotate an image
Rotate 90°, flip, or straighten a tilted photo.
Image toolConvert image format
PNG, JPG and WebP — convert any to any.