How to Add a Watermark to a PDF — "Confidential" or Page Numbers on Every Page at Once (Free)

Ever been asked to add a "Confidential" mark when sending a proposal or quote, or to put a "page number on every page" of a submission? A few pages is one thing, but touching dozens of pages one by one is far too much work. Fortunately, this kind of thing can be stamped identically across every page from a single text entry. This guide covers how to add watermarks and page numbers to every page of a PDF at once. No install, no sign-up required.

When you need this

• When you want to mark a document "Confidential," with a company name, or "For submission" to warn against unauthorized use or leaks.
• When the submission format requires a page number on every page (for example, 3 / 10).
• When you need a "DRAFT / SAMPLE" label to signal that it is not yet final.

How to add a watermark — 3 steps

1. Upload the PDF — drag and drop or select your file at PDF Watermark.
2. Set the text and options — enter the watermark text and choose the position (diagonal center / tiled), opacity, and color. If you need page numbers, just check "Add page numbers" as well.
3. Apply and download — click "Apply watermark" and it is applied identically to every page and downloads right away. If the result is too dark, just adjust the opacity and download again.

Uploaded files are used only for processing and are not stored on the server.

Tips for a clean look

• To avoid hurting readability of the body text, setting opacity to "light–medium" works well.
• To make something like "Confidential" stand out clearly, red + diagonal center catches the eye.
• To cover the whole page and discourage screenshots, use a tiled (checkerboard) layout.
• If the file got larger after adding a watermark → reduce it with Compress PDF.

Want to sign it in the same flow?

For a document that needs approval or a signature alongside a confidential label, add the watermark, then collect signatures and seals directly with FreeSign e-signature. It is all done on screen, with no stamp scanning or printing.

Frequently asked questions

Q. Does it apply to every page at once?
Yes. The same watermark is applied identically to every page of the uploaded PDF.

Q. Can I add only page numbers?
Yes. With no watermark text, just select "Add page numbers" and the number is placed at the bottom center.

Q. Is it free? Are my files stored?
It is free, and uploaded files are used only for processing and are not stored on the server.

Q. Can I change the watermark position and color?
Yes. You can choose the position (diagonal / tiled), opacity, and color to fit your document.