Watermark

Watermark is a local-first watermarking tool for PDFs and images. It is built for sensitive documents and is described as suitable for adding watermarks to items such as IDs, offer letters, and proofs without uploading them.

It supports diagonal or tiled watermarks on PDFs and images. The site says processing runs entirely in the browser, that files stay on the device, and that there are no uploads. It also says the tool handles scanned PDFs, including multi-page documents and files with internal page rotation, and that tiled watermarks can be adjusted for density and angle. A fast preview is provided, followed by clean output.

A Pro version adds batch watermarking and Secure Flatten PDF. Secure Flatten bakes the watermark into the page image so it is harder to remove in editors, although text may not remain selectable and file size may increase. Watermark is usable with no sign-in or account creation, and core watermarking is free. Watermark Pro is priced at ₹299 as a one-time fee. The page also states that there is no server upload, storage, or retention, no document analytics, and that any future cloud features will be opt-in and clearly labelled.