Free Online Image Pixelator
Pixelate a whole image or blur sensitive areas with adjustable blocks.
Drag a rectangle on the preview to choose the area to pixelate.
Larger blocks hide more detail and create a stronger mosaic.
No selection yet.
Pixelation is applied on top of the original pixels and cannot be undone from the downloaded file. Use it to obscure faces, names, plates, or screens before sharing a screenshot.
About the Image Pixelator
Pixelation replaces groups of pixels with a single averaged color, producing the chunky mosaic often used to hide identities in photographs, screenshots, and screen recordings. This tool works on the whole picture or on one rectangle that you draw directly over the preview. Everything is processed locally with the browser canvas, so the original file never leaves your device. When you are finished, download a fresh PNG, JPG, or WebP that contains the pixelated result.
Selecting an area
Choose A selected rectangle, then drag across the preview. A dashed outline marks the chosen region while you drag, and the mosaic follows your pointer. Release to keep the selection. The coordinates are stored as percentages of the image, so the export at full resolution matches the preview exactly, even though the preview itself is scaled down to fit the screen. Use Reset selection and draw again if the box is not right.
Choosing a block size
Small blocks of 4 to 8 pixels create a subtle stylized look that still shows shapes and colors. Medium blocks of 10 to 20 pixels are the usual choice for censoring faces or text while keeping the surrounding scene readable. Larger blocks of 30 pixels and above turn the area into abstract color fields. Very small blocks do not reliably hide text, because letters can sometimes still be guessed from the pattern.
Privacy notes
Pixelation is permanent in the exported file, but the underlying image data is still present in the original photo. If you share both the original and the pixelated copy, the hidden information is still recoverable from the original. Also check that no reflection, shadow, or second copy of the sensitive detail sits outside the selected rectangle. A mosaic only protects what it covers.
Frequently asked questions
Is pixelation the same as blurring?
No. Blurring mixes neighboring pixels smoothly, while pixelation averages blocks into flat squares. Pixelation usually hides detail more decisively and gives the familiar mosaic look.
Does the block size change the output dimensions?
No. The canvas keeps the original width and height. Only the visual detail inside the chosen area is reduced.
Can I pixelate several areas at once?
This page handles one rectangle at a time. Pixelate the first area, save the result, then load that saved image to pixelate a second region. For the whole image, switch the mode and every part is covered in one pass.