Remove a watermark from a PDF without uploading the file anywhere. The document is parsed in your browser, the likely stamps are found for you, and nothing is deleted until you confirm it.
It finds the watermark for you
A PDF is not one flat picture. Parsing it gives back the individual text runs, images, and vector shapes that make up each page, and a watermark added by Word, Acrobat, or an online tool is one of those pieces sitting on top of the rest.
Every element is scored on the traits that make a stamp recognisable. The strongest is repetition: the same thing at the same position on every page. On its own that is not enough, because a running header does it too, so a candidate also has to look like a stamp in some other way. It might sit at an angle, be faded well below full opacity, be set far larger than the body text, or read CONFIDENTIAL.
You confirm before anything goes
Candidates arrive with the reason each one was picked, so the decision is yours rather than the tool's. Confident ones are ticked already. Untick anything that belongs in the document, then download.
Selecting a stamp clears every copy of it across the whole file, which matters for a watermark tiled across each page.
When it cannot help
A scanned document is a photograph of a page. There is no text or shape inside it to delete, and a watermark printed into those pixels can only come out by redrawing the image. The tool detects that case and says so rather than showing you an editor that cannot fix it. The same is true of a watermark baked into a background image, which is how stock libraries apply theirs.
The same operation in your own product
This runs on the same pieces the SDK exposes. Parsing with PDF import gives the element tree, and PDF export writes the result back out. Going the other direction, the watermark API covers applying a stamp rather than taking one away, and the watermark tool does that in the browser.
