Image Blur
Free online image blur tool. Apply Gaussian blur to photos or blur only selected regions for privacy — all in your browser.
Click or drag images here
Supports JPG / PNG / WebP / BMP
Image Blur guide
Blurring for privacy: what actually protects people
Blur the right things: faces of bystanders, license plates, house numbers, screens showing accounts, shipping labels, and anything with a name plus address. A common mistake is blurring a name in one place but leaving it visible in an email preview or reflection elsewhere in the frame — check the whole image.
Why real Gaussian blur is irreversible here
Pixelation (mosaic) can sometimes be reversed with dejpegifying tools when the grid is small; naive darkening can be reversed by levels adjustment. True Gaussian blur with a generous radius, however, mathematically destroys information — the export contains a weighted average of neighborhoods, and there is nothing left to recover. Use a radius large enough that text is not merely “hard to read” but unreadable (typically 15+ for screenshots at full resolution).
Blur as a design tool
Beyond privacy, Gaussian blur powers modern UI aesthetics: frosted-glass backgrounds (blur 30-60 + slight white overlay), depth-of-field looks for product photos, and soft backgrounds behind text overlays. For text readability, blur the background 8-12 px and darken it 20% — that combination passes contrast checks on almost any photo.