Bring your imageA photo, screenshot or transparent PNG.
THE BIGGER-BLOCK PICTURE.
Pixelate Image
Online
The whole picture.
Or just a little part.Add a square mosaic to your photo, adjust the blocks, and save it at the original size. Free, right in your browser.
A LITTLE DETAIL. A LOT OF SQUARES.
or drop it here · PNG, JPG, WebP, GIF
Choose your squaresThe whole image or rectangles you mark.
Keep the size. Save the look.Original-size PNG or JPG, no watermark.
AN IMAGE PIXELATOR, WITHOUT THE EXTRA STEPS
Make a mosaic.
Keep the rest your way.
Pixelating an image replaces small details with square blocks of color. This online image pixelator uses the average color inside each block, giving photos and screenshots a mosaic effect while keeping their width and height.
- Open your photo or screenshot. Upload an image, drop it onto the tool or paste one from your clipboard. Use the sample to try the effect before choosing your own picture.
- Pixelate the whole image or just a part. Whole image gives your photo a uniform block effect. Selected areas lets you draw several rectangles while the surrounding picture stays sharp. Coordinates offer another way to place a box precisely.
- Find the right block size. Start at 16 px and compare the original with the result. Use larger squares for a coarser mosaic. Block size refers to the original image pixels, so a high-resolution photo may need a stronger setting.
- Download your edited image. Choose PNG for sharp block edges and transparency, or JPG for an opaque photo. Both keep the original dimensions. The selection borders and area labels are editing guides and stay out of the downloaded file.
Making a small retro image with a limited palette? Use the pixel art maker for image-to-pixel-art conversion, retro palettes and pixel-native PNG output. For a craft project, try the Perler bead pattern maker or cross stitch pattern maker.
BEFORE YOU SAVE YOUR SQUARES
Pixelating, explained.
How do I pixelate an image online?
Upload a PNG, JPG, WebP or GIF, choose Whole image and adjust the block size. Larger blocks create a stronger mosaic effect. Compare the original with the pixelated preview, then download a PNG or JPG at the original image dimensions. GIFs are opened as a still frame.
Can I pixelate only part of a picture?
Yes. Choose Selected areas, then drag a rectangle over the part you want to pixelate. Add up to 20 rectangles with a mouse or finger, or enter pixel coordinates. Undo the last area, remove an individual rectangle or clear them all. Pixels outside the rectangles stay unchanged before export.
Is this image pixelator free?
Yes. Whole-image and selected-area pixelation, previews and PNG/JPG downloads are free. There is no account requirement or watermark. The image is processed locally in your browser and is not uploaded to a conversion server.
What does the block size setting mean?
Block size is measured in pixels of your original image. At 16 px, each full block covers 16 × 16 pixels and becomes one averaged color. Edge blocks can be smaller. Try 8 or 16 for a finer mosaic and 32 or 64 for larger squares; the same setting appears stronger on a smaller image.
Does pixelating change the size or crop my image?
No. A supported image keeps its original width and height in the download. This tool changes the pixel colors, not the canvas dimensions. It supports files up to 20 MB and images up to 16 megapixels, with neither edge longer than 8,192 pixels.
What is the difference between pixelating and blurring?
Pixelation replaces groups of pixels with flat, square blocks. Blur blends nearby pixels into softer transitions. This tool creates a square mosaic effect with adjustable block size; it does not apply a blur filter.
How is this different from the pixel art maker?
This image pixelator focuses on a full-size mosaic effect and editing selected rectangles while keeping the rest of a picture sharp. The pixel art maker focuses on creating pixel art from an image, including retro color palettes, a pixel grid preview and compact pixel-native PNG output.
Can I pixelate a face or text in a screenshot?
Draw a rectangle around the full area, including its edges, then check the downloaded image. There is no automatic face detection. Pixelation is a visual effect and can leave identifying clues, especially in short text or numbers. For confidential information, use an opaque redaction method rather than relying on pixelation.
Should I download PNG or JPG?
PNG is lossless and preserves the edited transparency. JPG is useful for opaque photos and is exported with a white background wherever the image is transparent. JPG compression may slightly change colors and soften block edges. Selection outlines and area numbers are never included in either download.
Can I undo pixelation or improve an already pixelated photo?
You can switch to the original preview, remove areas or reset while the source image is still open here. A downloaded file contains the edited raster image, without the original image or edit layers. This tool adds pixelation; it does not reconstruct missing detail or unpixelate an existing photo.