Watermark a PDF

Adding a watermark to PDF pages

A watermark can label a document as a draft, copy, or internal version, or add another mark where you are authorized to do so. It changes the appearance of pages but does not secure the contents or prove who created the document.

Recommended workflow

Use a copy of the PDF, choose text and placement that do not cover important content, and check opacity, size, and page coverage in the preview. Consider whether the mark belongs on every page or only selected pages, then export after confirming that the watermark is appropriate for the document's audience.

Review before using or sharing

Inspect each page, including pages with footnotes, signatures, and images. Confirm text remains readable and that the mark does not imply official approval, ownership, or confidentiality that is not accurate. Keep the original and confirm the recipient accepts watermarked files.

Privacy and responsible use

PDF watermarking is intended to run in the browser. The file remains on your device until you export or share it. This does not cover account or saved-document features, which use server storage as described in the Privacy Policy.

A careful final check

Before you begin, identify the exact outcome you need and the rules of the service that will receive it. A file-size limit, image dimension, page order, or calculation date can be more important than a default setting. Keep source material unchanged, use only the minimum personal information required, and do not enter credentials or payment secrets into a general utility. If the browser reports an unsupported file or an incomplete result, stop and verify the source rather than assuming the export is correct.

After processing, compare the output with the source and test it in the context where it will be used. Check the receiving organization's current instructions, confirm that the format and file size are accepted, and retain a secure copy of important originals. For official, financial, legal, or identity documents, ask the responsible authority or a qualified professional when a decision depends on interpretation. These practical checks help catch common errors, but they do not replace an official review or guarantee that a result will be accepted.

Keep a clear distinction between a file saved only on your device and a file deliberately sent to an outside service. Some browser tools load fonts or models from third parties, and translation sends selected text to its provider after you give consent. Review prompts before confirming, close the page when finished on a shared computer, and delete temporary downloads or local browser data when appropriate. If a tool uses a server-backed feature, its processing route should be checked in the Privacy Policy before submitting sensitive material.