How to

How to Use Image Mosaic

Process JPEG, PNG, WebP, and other images in your browser. Add rectangle, circle, or rounded mosaic objects over faces, license plates, names, email addresses, API keys, and other sensitive details, then save as PNG, JPEG, or WebP.

Use Image Mosaic

Use Cases

When to use it

Hide faces before posting photos to social media or a blog
Cover license plates, nameplates, and address signs in street photos
Hide names, email addresses, IDs, and order numbers in screenshots
Redact customer names or dashboard figures from work documents
Mask API keys, tokens, or internal URLs before sharing with a team
Process multiple faces or text areas in a single image

Capabilities

What this tool can do

Drag to add rectangle, circle, or rounded-rectangle mosaic areas
Choose pixel mosaic, blur, or solid fill per region
Change intensity and shape per region after adding
Undo/Redo for all region changes
Download as PNG, JPEG, or WebP
Fully browser-based — images never leave your device

Guide

How to use each screen area

Learn how to use each screen area, including settings, input, previews, results, and saving.

01 HOWTO

Add an image and place mosaic objects

Add an image, then place mosaic objects over the parts you want to hide. Start by deciding whether you need to cover faces, license plates, names, IDs, or other visible details.

Screen showing image loading and mosaic object placement in Image Mosaic

What this area does

Add an image to the canvas
Confirm the image appears on the canvas
Place rectangle, circle, or rounded mosaic objects
Identify which placed object will be processed

Where to use it

Add image

Use Add image in the toolbar to load a photo or screenshot.

Add mosaic

Open Add mosaic, choose a rectangle, circle, or rounded object, and place it over the detail you want to hide.

02 HOWTO

Adjust shape, effect, and stacking

Select a mosaic object and adjust its shape, pixel/blur/fill effect, intensity, color, opacity, rounded corners, rotation, and size. Use layers and history when working with multiple areas.

Screen showing shape, effect, and stacking adjustments in Image Mosaic

What this area does

Move and resize the selected area
Switch between pixel, blur, and fill effects
Adjust intensity, color, opacity, and rounded corners
Review multiple areas with layers and history

Where to use it

Mosaic settings

Change the selected object shape, effect type, intensity, fill color, opacity, and related settings.

Layers and history

When multiple objects are placed, use Layers to select a target and History or Undo / Redo to return to previous edits.

03 HOWTO

Choose a format and copy or download

After confirming the hidden areas, choose an output format and copy or download the result. Copy for pasting into documents or chats, download when you need a saved file.