Mosaic-redact image regions
Mosaic a specified rectangular image region.
Local processing · Nothing is uploaded · 20 MB / 4 megapixel limit
Input & settings
Result
How to use
Enter the region to obscure and choose the mosaic block size. Inspect the result before sharing.
Limits and behavior
Mosaic can leave text or faces recognizable. For sensitive information, use an opaque cover in a dedicated editor. Still PNG, JPEG and WebP only; 20 MB, 4 megapixels and 4,096 pixels per side. Processing stays on your device. Exports apply orientation and discard source metadata. PNG output preserves transparency unless the selected operation composites it.
Pixelate a selected image region
Choose a rectangle and apply mosaic block averaging to obscure visible detail in that region.
Is pixelation a secure way to remove sensitive information?
No. Mosaic effects are not guaranteed irreversible redaction. Permanently cover or remove sensitive pixels for privacy.
Related tools: pixelate image · blur whole image