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2026-08-17T00:00:00.000ZImage Processing2 min read

Image Mosaic & Blur: Free Local Face & Plate Pixelation

How to add a mosaic to an image? Learn to pixelate or blur faces, license plates, and sensitive info online for free — no Photoshop needed, with precise local area controls.

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Before posting photos, you often need to blur faces, license plates, or sensitive info. Image mosaic is the most common privacy protection. Many people think they need Photoshop, but an online tool does it in seconds. This article shows you how to add mosaic or blur effects to images.

When you need to pixelate an image

  • Face protection: pixelate strangers in street photos and group shots
  • Plate masking: hide license plates when posting car photos or records
  • Sensitive info: numbers in chats, contracts, and ID documents
  • Content moderation: blur sensitive areas before publishing

Mosaic or blur an image with PixelForge

Open the PixelForge Mosaic Tool — browser-local processing, no uploads, extra private.

Step 1: Upload the image. Step 2: Choose mosaic (pixel blocks) or blur (soft Gaussian). Step 3: Paint over the areas to mask — adjustable brush size, multiple regions. Step 4: Download the masked image.

Pixelation tips

  1. Mosaic vs blur: mosaic pixelates thoroughly (best for plates and documents); blur looks more natural
  2. Brush slightly larger than the target so edges are fully covered
  3. Check every region — faces, plates, and numbers — and zoom in before publishing
  4. Compress after masking with the image compressor if the file is large

FAQ

What's the difference between mosaic and blur?

Mosaic pixelates the area into blocks for thorough hiding; blur applies Gaussian softening that looks more natural. For plates and documents use mosaic; for faces a blur looks cleaner.

How do I pixelate part of an image, not all of it?

Upload to the [PixelForge Mosaic Tool](https://img-tools.top/mosaic) and paint over just the areas you want — multiple regions and adjustable brush sizes supported.

Can a masked image be restored?

Proper local pixelation destroys the original pixels in that region, so it generally can't be reversed — that's why it's safer than cropping, which can sometimes be enlarged to reveal info.

Can I batch-mask many images?

Images are processed one at a time, but you can apply the same style of masking position across a batch.

Does masking affect the rest of the image?

No. Only the painted areas are masked; the rest of the image is completely unchanged.

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