Image Mosaic & Blur
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About this Tool
A specialized privacy protection and visual redaction utility that conceals sensitive data in screenshots and photographs using pixelated mosaic, smooth Gaussian blur, and solid blackout masking. Engineered with both geometric rectangular selection boxes and an agile freehand drawing brush, users can finely calibrate mask intensity and brush radius to obscure faces, license plates, credit card numbers, passwords, and residential addresses. With instant clipboard support (Ctrl+V to paste, one-click button to copy back), multi-level undo/redo histories, and lossless canvas rasterization, sensitive graphics never leave your local browser memory, guaranteeing total compliance with corporate privacy policies.
Processed safely on your device
Everything happens in your browser on this device. Your files are never sent to our servers—so you can use it with peace of mind.
How to Use
Paste your screenshot directly from your clipboard using Ctrl+V, or drag and drop an image file (PNG, JPG, WebP, GIF) into the canvas.
Choose your masking style (Pixelated Mosaic, Gaussian Blur, or Solid Blackout) and pick between 'Rectangle Area Drag' or 'Freehand Brush'.
Adjust mask block intensity or brush radius, then paint or drag over the private information you need to redact (undo with Ctrl+Z anytime).
Click 'Copy Image' to paste the redacted graphic immediately into your chat messenger, or click 'Download' to save as a clean PNG, JPG, or WebP file.
Key Scenarios & Use Cases
Redacting PII from Bank Statements, Invoices & Receipts
Conceal bank account numbers, residential addresses, total balances, and credit card digits before sharing expense proofs publicly.
IT Helpdesk & Bug Tracking Ticket Screenshots
Mask API keys, bearer tokens, database connection strings, and client passwords in technical bug reports across Jira, Slack, or GitHub.
Face & Identity Anonymization for Social Media
Apply soft Gaussian blur or pixel grid mosaic over bystander faces and minors in public event photos to respect portrait rights and privacy.
Vehicle License Plate & Location Redaction
Blackout automobile registration plates, street house numbers, and identifiable landmarks before listing vehicles or properties on classified portals.
Chat Messenger & Customer Support Privacy
Blur sender profile pictures, contact handles, and phone numbers in conversational screenshots before publishing reviews or testimonials.
Frequently Asked Questions (FAQ)
Mosaic groups neighboring pixels into uniform color blocks (pixelation); Blur convolves pixel neighborhoods using a Gaussian kernel to create a smooth, illegible haze; and Blackout completely overwrites the underlying pixel array with an opaque solid color.
Because pixel averaging destroys high-frequency edge information permanently, recovering original text from a high-intensity mosaic or heavy blur is mathematically impossible. For legal or maximum-security compliance, solid Blackout provides 100% mathematical zero-information protection.
Yes. Pressing Ctrl+V (or Cmd+V on macOS) immediately mounts your clipboard screenshot onto the canvas. After redaction, clicking 'Copy Image' writes the masked PNG back to your clipboard for instant pasting into Slack, Teams, or email.
Yes. You can apply multiple rectangular drag boxes and freehand brush strokes across different sections of the same image in a single workflow. Every action is recorded in the history stack for individual undo/redo.
You can export your finished image as a lossless PNG (preserving transparent areas), an optimized JPEG with selectable quality, or a modern, lightweight WebP file.
Never. All pixel manipulation, Gaussian filtering, and canvas encoding execute strictly inside your local browser memory sandbox. Zero image data is ever transmitted across the network.