Upload images
Click or drag files to add mosaic/blur
No images uploaded.
Free Image Mosaic Tool - Blur & Pixelate Online
Professional online mosaic tool for adding pixelation and blur effects to images. Protect privacy and hide sensitive information with shape and brush modes. Adjust intensity freely. All processing happens locally in your browser for complete privacy. No watermark, instant download. Perfect for ID cards, faces, screenshots, and sensitive content.
Image Mosaic Features
Mosaic Pixelation
Add mosaic pixelation effect to convert image areas into pixel blocks. Use the mosaic tool to hide sensitive information and protect privacy. Adjust mosaic intensity to control pixel block size.
Blur Effect
Add Gaussian blur effect to soften image areas. Create natural blur effects with the online mosaic tool. Adjust blur intensity for different censoring needs.
Shape Mode
Precisely censor areas using shapes like rectangles, rounded rectangles, ellipses, and triangles. Lock aspect ratio and adjust corner radius. Use the mosaic tool to accurately cover specific regions.
Brush Mode
Freely paint mosaic or blur effects with brush mode. Adjust brush size to flexibly handle irregular areas. The online mosaic tool supports freehand censoring.
Batch Processing
Add mosaic or blur effects to multiple images simultaneously. Supports batch processing up to 20 images. Use batch mosaic for efficient bulk processing.
Undo/Redo
Undo and redo operations to modify mosaic areas anytime. Copy and paste mosaic regions to improve editing efficiency. The mosaic tool provides flexible editing control.
Zoom Editing
Zoom in/out for precise editing. Pan the view after zooming. Use the online mosaic tool to accurately process detailed areas.
Privacy Protection
All mosaic processing is done locally in your browser. Images never leave your device or upload to any server. Use the mosaic tool with complete privacy protection and data security.
How to Use the Image Mosaic Tool
Upload images to mosaic
Click upload or drag image files. Supports JPG, PNG, WebP, BMP formats, max 50MB per image. Batch upload multiple images to add mosaic effects together.
Add mosaic or blur effects
Choose mosaic or blur effect type. Select shape mode for precise censoring or brush mode for freehand painting. Adjust intensity to control effect strength. Draw on the image to mark areas to censor. Supports undo/redo and copy/paste regions.
Download processed images
After confirming the mosaic effect, click download to save processed images. Single images download directly, multiple images download as ZIP. No watermark output, ready to use.
Image Mosaic Use Cases
ID Card Information
Censor sensitive information on ID cards, passports, driver's licenses. Use the mosaic tool to hide names, ID numbers, addresses and other private data, protecting personal privacy.
Face Privacy
Mosaic faces in photos for privacy protection. Use the online mosaic tool to censor passersby, children, and unauthorized individuals, meeting privacy requirements.
Chat Screenshots
Censor personal information in chat screenshots. Use the mosaic tool to hide avatars, nicknames, phone numbers, WeChat IDs before sharing.
Document Content
Censor confidential content in document screenshots. Use the online mosaic tool to hide contract amounts, financial data, internal information.
License Plates
Mosaic license plates in photos. Use the mosaic tool to censor plate numbers, protecting vehicle owner privacy and preventing information leaks.
Screen Captures
Censor sensitive information in computer/phone screenshots. Use the online mosaic tool to hide accounts, passwords, emails, addresses before sharing.
Social Media Posts
Censor privacy before posting photos on social media. Use the mosaic tool to hide house numbers, street signs, vehicles that could reveal location.
Teaching Materials
Censor example information in teaching materials. Use the online mosaic tool to hide student names, grades, personal data.
Online Shopping
Censor order information when sharing purchases. Use the mosaic tool to hide delivery addresses, phone numbers, order numbers.
Batch Processing
Need to mosaic many images uniformly. Use batch mosaic to process multiple images at once, saving time and ensuring consistent results.
Image Mosaic Tips
Choose Appropriate Intensity
Set mosaic intensity to medium-high to ensure information is completely unrecognizable. Adjust blur intensity based on content. Use the mosaic tool to find the optimal censoring effect.
Shape Mode for Quick Censoring
Use shape mode for regular areas. Rectangles suit ID cards and text, ellipses suit faces. The online mosaic tool provides multiple shape options.
Brush for Irregular Areas
Use brush mode for irregular areas. Adjust brush size to fit different regions. Use the mosaic tool's brush feature for flexible censoring.
Zoom for Precision
Zoom in to precisely edit detailed areas. Ensure all sensitive information is completely censored. The online mosaic tool supports zoom functionality.
Copy/Paste Regions
When multiple identical areas need censoring, use copy/paste. Improves editing efficiency and maintains consistent effects. The mosaic tool supports region copying.
Batch Process Similar Images
Use batch mosaic for same type of images. Set once, process in batch, greatly improving work efficiency.
Why Choose Our Image Mosaic Tool
100% Free Forever
The mosaic tool is completely free with no hidden fees or premium versions. All features including batch mosaic, shapes and brushes are freely available with unlimited use.
No Installation Required
Completely browser-based online mosaic tool, ready to use when you open the page. No software download or installation, no registration or login, start mosaicking images immediately.
Privacy Guaranteed
All mosaic processing is done locally in your browser. When using the mosaic tool, images never upload to servers, completely protecting your image privacy and data security.
Efficient Batch Processing
Supports batch mosaic to process multiple images at once. Unified processing effects save significant time. The online mosaic tool meets professional batch processing needs.
No Watermark Output
Processed images have absolutely no tool watermark. Images processed with the mosaic tool are ready to use immediately for any purpose.
Rich Professional Features
The online mosaic tool offers both mosaic and blur effects, shape and brush modes. Supports intensity adjustment, undo/redo, zoom editing and other professional features.
Image Mosaic FAQ
More Image Processing Tools
Need other image processing features? Try these professional tools: