Blur an Image Online
Soften a face, a background, or a sensitive detail with an adjustable blur — free and right in your browser.
Drop an image to blur
Drag & drop, paste, or pick a file
PNG · JPG · WebP · GIF · BMP — obscured on your device
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.
How blur image works
- What it does
- Adjustable Gaussian-style blur
- How the tool does it
- The tool runs a separable box blur three times over the selected pixels, which closely approximates a true Gaussian blur, and the edges are clamped so the softening never bleeds outside your box.
- What it's for
- A soft blur is ideal for keeping a photo looking natural while making a background face, a house number, a street sign, or a name on a screen unreadable before you share it.
- Can it be reversed?
- A blur averages the underlying pixels rather than deleting them, so a light blur can sometimes be partially reversed by software — push the strength high for anything genuinely sensitive.
Tip: Slide the strength up until you genuinely cannot make out the detail at full zoom; if it is still faintly legible, it is not yet hidden.
More ways to blur & hide
Frequently asked questions
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.
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