🔲 Photo mosaic processing

Online tool to apply mosaic or blur to an image. Select an area by dragging the mouse and adjust the intensity. Available for download in PNG/JPEG format.

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Click or drag & dropto select image

JPEG, PNG, WebP supported

Usage and Tips

  • Upload the image and drag to select the area you want to mosaic.
  • Choose from two modes: "Mosaic" and "Blur".
  • Strength slider to adjust mosaic roughness and blur intensity
  • Undo" undoes the previous operation.

What is Photo Mosaic?

A photo mosaic tool applies pixelation or blur effects to your images directly in your browser. Perfect for privacy protection, creative editing, or visual effects, this tool lets you selectively obscure parts of photos. Choose mosaic strength or blur intensity to find your desired effect. Download the edited image in seconds. No software installation needed—everything happens online.

How to Use

Upload or drag-and-drop your photo into the tool. The image displays in an editor canvas. Use your mouse to select the area you want to pixelate or blur by clicking and dragging. Adjust the effect strength using a slider—increase it for more obscured privacy or decrease it for subtle effects. Switch between mosaic (pixel blocks) and blur modes depending on your preference. Preview the effect in real-time. Once satisfied, undo any mistakes with the undo button or clear and restart. When finished, click download to save the modified image to your device. Most tools support common formats like JPEG and PNG.

Use Cases

Photo mosaic tools serve practical and creative purposes:
• Privacy protection—obscure faces, license plates, or sensitive information in photos before sharing online
• Social media—blur backgrounds before posting to protect locations or bystanders
• Document editing—hide personal details in screenshots or document photos
• Creative effects—intentionally pixelate images for artistic, retro looks
• Children's safety—protect children's faces in photos before public sharing
• Professional use—redact sensitive details in before-and-after photos or case studies

A developer might blur license plates in a traffic screenshot. Teachers hide student identities before sharing classroom photos. Photographers add artistic pixelation for creative effects. Privacy-conscious users protect family photos before uploading.

Tips & Insights

Mosaic creates obvious pixel blocks, while blur provides smoother, less obvious obscuring. Choose mosaic for clear privacy protection; blur works better for subtle editing. Larger mosaic block sizes offer stronger obscuring but look less refined. Test blur radius values—slight blur might still be reversible, while heavy blur is obviously intentional. Avoid over-editing; subtle effects maintain photo quality. Remember that pixelating doesn't encrypt—serious privacy needs require stronger protection. Always preview before downloading to catch missed areas or excessive effects.

Frequently Asked Questions

Will images be uploaded to the server?

No, all processing takes place in the browser. No images are sent to the server. Your privacy is fully protected.

What is the difference between mosaic and blur?

Mosaic is the process of dividing pixels into large blocks and coarsening them, while blurring is the process of averaging them with the surrounding pixels and blurring them smoothly.

What image formats are supported?

It supports common image formats such as JPEG, PNG, WebP, GIF, and BMP. Output can be in PNG or JPEG format.

What is the maximum file size for images?

The tool handles most common image files up to several MB, though very large files may process slower. For best performance, compress images to under 5MB before uploading.

How does the browser version compare to desktop tools?

This browser tool provides professional-grade mosaic and blur effects comparable to desktop applications, with the added convenience of no installation. Processing happens entirely in your browser, making it fast and secure.

Can I adjust the intensity of the blur effect?

Yes, you can customize the blur radius to create effects ranging from subtle softening to heavy pixelation. A slider lets you fine-tune the exact intensity before applying.

How many undo steps are available?

You can undo multiple editing steps to return to previous states of your image. This gives you flexibility to experiment with different effects without losing progress.

Does the tool work on mobile devices?

Yes, the photo mosaic tool is fully responsive for smartphones and tablets. Touch-based area selection and effect adjustments work smoothly on mobile screens.

Can I process multiple images at once?

Currently, the tool processes one image at a time, but you can quickly apply the same effect settings to multiple images in succession. Save your preferred settings to apply them consistently across images.