Guides JP

Image Mosaic & Blur Tool

Easily hide personal information and faces in images with mosaic, blur, or solid fill. Paste screenshots directly with Ctrl+V. All processing happens in your browser.

Last updated: 2026/10/18 Image Feedback & bug reports
Selection Mode
Selection Operation
Effect Type
Parameters
Mosaic Strength 15px
Opacity 100%
Pattern
Pixel
Color
My Settings
100%
Keyboard Shortcuts
1Rectangle select
2Circle select
3Brush
4Lasso select
5Polygon select
MMosaic
BBlur
FFill
RToggle Normal / Invert
SpacePan image (drag)
Ctrl+ScrollZoom
+ / -Zoom in / out
Ctrl+0Zoom to fit
Ctrl+ZUndo
Ctrl+Shift+ZRedo
Ctrl+SDownload
Ctrl+CCopy to clipboard
HCompare before/after (hold)
Shift+DragConstrain to square/circle
Alt+DragSubtract from selection
[ / ]Brush size decrease / increase
DeleteRemove last polygon point

Drag & drop

or

Ctrl+V Ctrl+V to paste screenshot

JPEG, PNG, WebP, iPhone HEIC (max 20MB)

Mosaic Strength 15px

How to Use

1

Select an Image

Drag & drop, click to select, or paste a screenshot with Ctrl+V.

2

Apply Effect

Choose mosaic, blur, or fill and drag over areas to hide. Shift+drag to add, Alt+drag to subtract.

3

Download

Save as PNG/JPEG/WebP or copy to clipboard.

About Image Mosaic & Blur Tool

An online tool to hide personal information (faces, names, addresses) in photos using mosaic, blur, or fill. Optimized for screenshot processing with Ctrl+V paste. All processing happens in your browser.

Features

  • Ctrl+V PastePaste screenshots directly with Ctrl+V (Cmd+V). No need to save files first.
  • 3 Effect TypesMosaic (10 patterns), blur, and solid fill to choose from.
  • 5 Selection ModesRectangle, circle, brush, lasso, and polygon for precise selection.
  • Browser-Only ProcessingAll processing happens locally. Your images are never uploaded to any server.

Use Cases

  • Hide personal info before sharing on social media
  • Mask sensitive data in screenshots
  • Process images for blog posts
  • Blur faces or license plates
  • Redact data in test screenshots

FAQ

Are images uploaded to a server?
No. All processing happens in your browser. Your images are never sent to any server.
Can I paste screenshots directly?
Yes. Use Ctrl+V (Cmd+V on Mac) to paste images from your clipboard.
When should I use mosaic vs blur vs fill?
Use mosaic or fill to securely hide information. Use blur for a natural look.
Can I process multiple areas at once?
Yes. Use Add mode (Shift+drag) to select multiple areas.
Can I change mosaic patterns?
Yes. Choose from 10 patterns including pixel, diamond, hexagon, and more.
What image formats are supported?
JPEG, PNG, WebP, and HEIC (iPhone photos). Up to 20MB.
Does it work on mobile?
Yes. Touch and pinch zoom are supported.
Can I copy results to clipboard?
Yes. Use the Copy button for PNG clipboard copy (some browsers may not support this).

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