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UBIS TOOL

Image Mosaic & Redaction

Pixelate selected areas of a photo or cover them with an opaque color.

  1. 1 Choose file
  2. 2 Edit and adjust
  3. 3 Download

or drag and drop a file here.

JPG · PNG · WebP

One file at a time · Maximum 20MB · 16 million pixels

How to use

  1. 01

    Choose file

    Choose one JPG, PNG, or WebP image.

  2. 02

    Select areas to cover

    Drag or enter coordinates, then apply pixelation or an opaque cover.

  3. 03

    Save result

    Check the covered areas and save as PNG or JPG.

Frequently asked questions

What do the coordinates refer to?

The top-left corner of the original is X=0, Y=0. Coordinates and pixel block sizes use original image pixels. You can apply up to 100 areas.

Supported files and limits

One browser-readable JPG, PNG, or WebP image is supported. Animated images are processed as a single still frame. Limits: 20MB, 12,000px per side, and 16 million pixels in total. Devices with less memory may need smaller files.

How does saving affect the image?

The original pixel dimensions are retained. PNG keeps transparency; JPG is recompressed over a white background. Camera metadata and file structure are not preserved as-is. The original file is unchanged.

Does it detect faces automatically?

You select areas manually. Before saving, check that all required faces, names, addresses, and license plates are covered.

Important information

Your input and files are processed in your browser. They are not sent to a processing server or written to browser storage. Keep your original file, then reopen the saved result to check its content and placement. Refreshing or closing the page clears your work.

Use an opaque cover for sensitive information and check that every required area is covered.

Tested example

Input and settings

A 256 × 160px test image; cover an 80 × 50 area at X=20, Y=20

Observed result

A same-sized PNG with changed pixels inside the selected area

What to check

Redaction is manual. Use an opaque cover for sensitive content and inspect the saved file.

Examples use synthetic, non-personal test material. Results apply to the inputs and settings shown; different files and devices can produce different sizes, timing and appearance.