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Watermark PDF
Add a diagonal text watermark to every page of a PDF, with a preset light opacity. No upload, no signup, and free to use in your browser.
How to use Watermark PDF
- Drop a PDF file.
- Type the watermark text.
- Download with a diagonal mark.
Label every page with a visible watermark
Enter a short label such as DRAFT or CONFIDENTIAL. PaperKit adds a light diagonal text mark to every page. This makes a review copy recognizable while preserving the original file separately.
Use short wording and inspect the result
Long labels can overlap more of the page than expected. The current tool uses a preset style and opacity; it does not provide an opacity slider or an image-logo upload. Review both dense text pages and small pages in the preview before sending the result.
A label is not access control
A watermark does not encrypt the document, restrict copying, or hide confidential information. It adds visible text. For a smaller label on only a few pages, use Stamp Text and enter the target page numbers.
Next steps
Related PDF tools
- Stamp Text — Stamp text such as “CONFIDENTIAL” or “DRAFT” on selected pages of a PDF.
- Add Page Numbers — Add page numbers to a PDF in the position and style you choose. Free and private.
- Sign PDF — Add a typed signature image to a selected PDF page, then download the result.
Frequently asked questions
How do I use Watermark PDF?
Drop a PDF file. Type the watermark text. Download with a diagonal mark. The finished file is created in your browser.
Is this watermark pdf tool private?
Yes. Watermark PDF runs locally in your browser, so your PDF is not uploaded to PaperKit or stored on a server.
Will Watermark PDF change my original PDF?
No. PaperKit creates a new downloadable file and leaves your original document unchanged.