Watermark removal

Neither. The page downloads no model and makes no network request related to your image: loading, marking, inpainting and exporting all run in your browser's memory via canvas - the server has neither your image nor any queryable processing record. Closing or refreshing the page erases the image from memory, so download before you do that.

Look at two sides. The watermark itself: semi-transparent text and logos, pure white or solid-color corner marks, and small text tiled across the image all work - it is enough that the mark covers the pixels. The background: over sky, solid colors, gradients, white backgrounds or blurred portraits the repair is barely visible; over grass, leaves, dense fabric or crowds (high-frequency texture) it leaves visible smearing - see the capability limits above.

It can be processed, but doing it in several passes is recommended. The tool splits your marked area into connected components and inpaints each independently: a few dozen small tiled marks take about one or two seconds on a desktop browser, longer on a phone. If one pass covers too much, the page tells you to split it up instead of making you wait on a spinning progress bar.

No. Writing happens only inside your marked area (plus the few pixels of 'edge expansion' around it); every byte outside stays exactly as it was - verified pixel by pixel by tests before release. The export is a newly encoded image at the original resolution; the file on your computer is never modified.

Not recommended - please do not do this. A watermark is usually precisely how a rights holder asserts rights over a work; removing it from someone else's work and redistributing may infringe copyright and the right of network dissemination. This tool is only for scenarios where you have the right to process the image: recovering the clean version of your own original, licensed stock you bought with permission, or your own product photos. Legality of use is the user's own responsibility.

They solve different problems: watermark removal tries to restore the background so nothing shows it was there; mosaic covers the content and admits it is blurred - right for hiding private information; cropping just shrinks the frame and cuts off the watermarked strip - the cleanest and fastest when the size allows. If the watermark sits against the edge of the image, try cropping first.

One image up to 20MB and 20 megapixels, the same limits as the other image tools on the site. Beyond that the page asks you to run image compression or batch resize first. Also, an excessive total amount of marking (half the image painted at once, say) is refused with a hint to split it into passes - a browser gives one page limited memory, and pushing it crashes the whole tab.

Yes: painting uses pointer events, so you can drag a finger over the watermark directly, and the export is at full original resolution too. Time depends on the marked area, not the total image size - a corner mark of a few tens of pixels takes tens of milliseconds on desktop, a full-image tiled watermark about one or two seconds, and a phone is roughly three to five times slower. While waiting, the status line first says it is reading pixels, then that it is inpainting.