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Add Watermark to PDF

Stamp clear, adjustable text watermarks onto PDF pages without uploading your file.

Privacy: your files never leave your device. All processing happens locally in your browser.

How to use

  1. 1.Choose a PDF file from your device.
  2. 2.Set the watermark text, page range, placement, color, opacity, size, and rotation.
  3. 3.Add the watermark, review the new PDF, and download the watermarked copy.

About Add Watermark to PDF

Add Watermark to PDF gives you a practical way to label documents before sharing them. Use it for drafts, internal copies, review files, confidential material, sample packs, or anything that needs a visible ownership or status mark. The tool adds text directly to the selected PDF pages in your browser, so the original file stays on your device throughout the process. There is no account step, no server-side conversion queue, and no need to send a sensitive contract or report to a third party just to add a label.

Start by choosing a short watermark such as CONFIDENTIAL, DRAFT, INTERNAL USE ONLY, PAID, or your company name. You can change the font size, text color, opacity, and angle to suit the document. A low-opacity diagonal mark works well for a general review copy, while a compact corner mark can identify a version without obscuring the page. If a single mark is not enough, choose the repeated layout to stamp the text across the page. This is useful when you want the label to remain visible after a screenshot or partial crop.

The page selector accepts all pages or a focused range such as 1-3, 5. That makes it possible to mark a cover, an appendix, or a few sensitive pages while leaving the rest untouched. Each selected page is measured separately before the text is placed, so mixed-size files can receive a watermark that fits each page rather than relying on the first page's dimensions. Long text is reduced when necessary to keep it inside the page's horizontal safe area.

A useful workflow is to make one restrained review copy first, then create a stronger distribution copy if it is needed. For example, a small gray INTERNAL REVIEW label in a corner can help a team compare layouts without making charts hard to read. A second export with a larger semi-transparent CONFIDENTIAL label across every page is better suited to a sensitive external draft. Because the source file remains untouched, you can prepare several versions from the same original and name each download for its recipient, stage, or approval status.

This tool creates a new download and never replaces the source PDF. It is designed for ordinary PDF files that allow editing. Password-protected, encrypted, or damaged files are stopped with a clear error instead of attempting an unreliable export. Some scanned PDFs include a rotation setting. In that case, PDF coordinates can differ from the orientation shown by a viewer, so the tool displays a note before you export. Check the downloaded result whenever a document has rotated scan pages.

A text watermark is a visible label, not a digital signature, encryption feature, or access control system. Anyone who receives a normal PDF can still copy or edit it with suitable software. For stronger protection, combine a visible watermark with your organization's sharing permissions and retention policy. For everyday review and distribution workflows, however, a clear local watermark is often the fastest and least intrusive way to make the document's status obvious.

Methodology & sources

The tool loads a standard PDF locally, measures each selected page with its embedded Helvetica Bold watermark font, calculates the requested single or repeated placement for that page, draws the text with the chosen RGB color, opacity, and rotation, then saves a new PDF. It does not bypass encryption or modify the source file.

Frequently asked questions

Does Add Watermark to PDF upload my document?
No. The PDF is processed locally in your browser and the original stays on your device.
Can I watermark only selected pages?
Yes. Enter all for every page, or use a range such as 1-3, 5 to watermark only those pages.
What happens with password-protected PDFs?
The tool stops and asks you to remove the protection first. It does not try to bypass passwords or create an unreliable file.
Why can a corner watermark look different on a scanned PDF?
Some scanned files carry a rotation setting. Placement follows PDF coordinates, so review the downloaded result when the tool reports rotated pages.
Is a visible watermark the same as a digital signature?
No. A watermark is a visible label. It does not verify identity, encrypt the PDF, or control who can edit the file.

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