Pixelate image
Apply a mosaic effect to the whole image and download a copy.
Maximum 25 MB and 40 megapixels. Each dimension supports up to 16,384 px. Everything is processed in your browser.
Reprocessing can change metadata and color profiles. JPG does not preserve transparency: a white background is used. PNG and WebP support transparency.
Your files are processed here, on your device
We do not send your file or text contents to a processing server. No account is needed and there is no daily operation quota. Individual tools have size limits to protect your device’s memory.
A connection is needed to load the site and its resources. Hosting may receive technical visit data. Favorites store only tool identifiers in this browser.
How we handle your data →How to use this tool
- Load a PNG, JPG or WebP image.
- Choose block size, output format and quality.
- Process and compare the preview before downloading a copy.
An example you can verify
Apply a mosaic effect to an image for a design.
Example input
400 × 200 px sample image.
Expected result
400 × 200 px PNG produced from a 20 × 10 cell grid.
Try these files containing fictitious data:
Download sample · image-400x200.png
Final dimensions stay unchanged. The effect covers the whole image and does not securely redact private data.
Settings and limits
Load a PNG, JPG or WebP and choose a block size from 2 to 256 pixels. The image is reduced to a grid and enlarged without smoothing, preserving its dimensions. Larger blocks produce a stronger effect. Choose output format and quality. Maximum 25 MB, 40 megapixels and 16,384 px per dimension.
Frequently asked questions
Does this securely hide private information?
No. This applies a visual effect to the whole image, rather than secure redaction. Features may remain recognizable and pixelation does not guarantee information cannot be recovered.
Are my data stored on a server?
No. Content and files are processed in your browser without an account. Closing the page loses unsaved results.