# Watermark PDF > Stamp text over every page. - Page: https://acepdfmd.com/tool/watermark/ - Updated: 2026-09-12 - Runs at: https://acepdfmd.com (Uploaded files are deleted within 60 minutes. No signup for light use.) - Also in 29 languages: https://acepdfmd.com//tool/watermark/ ## Add a watermark to a PDF to mark it confidential or draft Sending out a draft contract, an internal report, or a proposal before it is final often calls for a visible label on every page, something a reader cannot miss or crop out. Watermark PDF stamps your own text diagonally over each page so status is clear at a glance. The text defaults to the word confidential, but you can type anything: a company name, a draft date, or a do not distribute notice. You pick the font from a short list, set the size, choose a color, and decide whether it should be bold or italic. Opacity starts around thirty percent so the mark sits behind readable text instead of blocking it, and rotation defaults to a forty five degree diagonal, though any angle works. Smaller files are watermarked in your browser, while larger or complex PDFs go over a secure connection to the servers and are removed within the hour. - Keep opacity low if the page has dense text, so the mark stays visible without making the content hard to read. - Pick a color that contrasts with your page background, since a pale mark on a pale page can end up nearly invisible. - Remember this is a visual label, not a security control, so pair it with Redact PDF if you need to remove sensitive text rather than just label the page. ## How to use the Watermark PDF tool 1. Add your PDF file: drag & drop or click to browse. 2. Set your options: Watermark text, Opacity (0-1), Font, Font size. 3. Click “Process Watermark PDF” and download your result. ## Common questions ### Is Watermark PDF free? Yes. Watermark PDF is free for light use with no signup needed. Anonymous visitors get 10 free tasks per day, and creating a free account makes daily use unlimited. A paid Pro plan removes ads and raises file-size limits for heavier work. ### Is my file safe? Yes. Simple files are processed directly in your browser and never leave your device. Larger or more complex files are sent over HTTPS, processed by self-hosted open-source software on our servers, and deleted within 60 minutes at the latest. ### What file formats does Watermark PDF accept? Watermark PDF accepts PDF files. Convert other formats to a supported one first; the related tools below can usually do it. ## Related tools - [Add Page Numbers](https://acepdfmd.com/tool/page-numbers/): Insert page numbers into your document. - [Protect PDF](https://acepdfmd.com/tool/protect/): Add a password to encrypt your PDF. - [Flatten PDF](https://acepdfmd.com/tool/flatten-pdf/): Bake form field values into the page and lock them. - [Edit PDF](https://acepdfmd.com/tool/edit-pdf/): Add text, boxes, or images anywhere on the page. - [Sign PDF](https://acepdfmd.com/tool/sign-pdf/): Draw a signature and place it on your document. Read the guide: [Is It Safe to Upload a PDF Online? A Privacy Guide](https://acepdfmd.com/guides/privacy-guide/)