How to add a watermark to a PDF
A watermark is faint text laid across each page — DRAFT, CONFIDENTIAL, a company name, or a copyright line. It signals the document's status, discourages unauthorised reuse, and marks ownership without obscuring the content underneath.
This tool draws a diagonal watermark on every page in your browser. Your file is never uploaded, so even sensitive documents stay on your device. Type the text, pick how strong it should be, and download the watermarked PDF.
Step by step
- Choose a PDF.
- Type the watermark text and choose its opacity.
- Click Add watermark to download.
Why watermark in the browser?
Watermarking is most useful on documents you'd rather not hand to a stranger's server — drafts, proposals, confidential reports. Doing it locally keeps the file private, works instantly, and has no size limit. The watermark is drawn as real text, semi-transparent and rotated, so the content stays readable.
Common uses
- Marking a document as DRAFT or CONFIDENTIAL.
- Adding a company name or copyright line.
- Discouraging unauthorised sharing of a proposal.
- Branding handouts and reports.
Frequently asked questions
Is my file uploaded?
No. The watermark is added in your browser. Your PDF never leaves your device.
Can I use my own text?
Yes — type any text you like before adding the watermark.
Does it cover the content?
No. The watermark is semi-transparent so the page underneath stays readable.
Is it free?
Yes, completely free with no signup.