Photo Prep: Mosaic & Resize

Prepare a photo before you share it.

Cover selected areas with a solid rectangle or mosaic. Adjust pixel dimensions or a file-size ceiling when you need to, inspect the actual JPEG, then save or share a separate copy.

Use only the tools you need
• Manual rectangular solid covering and mosaic
• Maximum width and height with a fixed aspect ratio
• Optional KB ceiling, or no file-size target
• Source-detail view and a zoomable actual JPEG result
• Save a new copy without overwriting the original
• Receive a photo from another app and open the share sheet for your result

Resize or compress without adding a covered region. Photo processing happens on your device. There is no account or developer-operated photo-upload server. Advertising services have separate data processing, as explained in the privacy policy.

Supported files and limits
One JPEG or static 8-bit PNG, up to 12 MiB, 12 million pixels and 8192 pixels per edge. HEIC, animated images, 16-bit PNG, video and PDF are not supported. Output is JPEG. Transparent PNGs require your approval for a white background.

The optional file-size ceiling is 10–2000 KB; 1 KB means 1000 bytes. This is a maximum, not an exact output size. If the target cannot be met, the app explains the problem. Further pixel reduction is used only when you explicitly allow it. Output without a target is still limited to 8 MiB.

Check before sharing
JPEG is lossy. Inspect covered areas and text readability in the actual result. Source metadata and color profiles are not retained. Manual selection does not automatically find private information, and mosaic does not guarantee anonymity. Use solid covering for private text and check the entire image. Acceptance by an upload form and delivery to a receiving app are not guaranteed.

Core editing, saving and sharing remain available without a successful ad. The advertising-enabled release requests non-personalized result-screen ads. Non-personalized does not mean no advertising data processing. There is no subscription or in-app purchase.

Read the full English or Korean privacy policy and terms offline from Help & privacy. Website links open only when you choose them.