How do I watermark a PDF without uploading it?

Drop the file on this page. The stamp is drawn in the tab. Close it and the working copy is gone.

Can I add an image watermark, not just text?

Yes. Choose Image and pick a JPG, PNG, or WebP file. It is embedded locally.

Can I watermark only some pages?

Yes. Use All, Odd, Even, or uncheck pages. The download is a new PDF.

Does a watermark protect the file from copying?

No. It is a visible overlay. It does not encrypt the PDF or stop screenshots. Use a password on your computer if you need access control.

Will watermarking change my original PDF?

No. You download a stamped copy. The file you dropped stays as it is on disk.

← All tools

Text or image, drawn here

Watermark a PDF

A watermark PDF tool is how you mark a draft, a proof, or a client preview so it does not wander off as “final.” This page stamps text or an image (opacity, position, rotation, all pages or a range) with pdf-lib in the browser. CONFIDENTIAL on the diagonal is the usual text case. A PNG logo works when you want a brand mark instead of a word.

The stamp sits on top of the existing page content. It is not a secure DRM flag; anyone with a PDF editor can try to cover it. Treat it as a visible reminder, not encryption. Files and logo images stay in the tab. You download a new PDF. Skip pages with the checklist if the cover should stay clean. Unlock encrypted PDFs before you drop them.

The PDF and any watermark image stay in this tab. Nothing is uploaded.

Add files

Drop a PDF file, or browse. They stay on this device.

No upload. No account.

No files yet. Drop them above. They stay in this tab and are never uploaded.

How to add a watermark to a PDF

Drop the PDF you want to stamp.
Choose text or image. Type the line, or pick a JPG, PNG, or WebP logo.
Set opacity, position, rotation, and size. Select all pages or a range.
Add watermark and download the stamped copy. Nothing was uploaded.

Watermark PDF without an online stamp service

Web stampers that upload see the whole document, which is exactly what you are trying to label as internal. This watermarker never gets the file. You also will not get dynamic Bates numbering or a lawyer-grade redaction suite, just a local overlay you control.

Questions

How do I watermark a PDF without uploading it?: Drop the file on this page. The stamp is drawn in the tab. Close it and the working copy is gone.
Can I add an image watermark, not just text?: Yes. Choose Image and pick a JPG, PNG, or WebP file. It is embedded locally.
Can I watermark only some pages?: Yes. Use All, Odd, Even, or uncheck pages. The download is a new PDF.
Does a watermark protect the file from copying?: No. It is a visible overlay. It does not encrypt the PDF or stop screenshots. Use a password on your computer if you need access control.
Will watermarking change my original PDF?: No. You download a stamped copy. The file you dropped stays as it is on disk.