Stamp a text watermark across every page of your PDF, choose the color, opacity, size and layout, free and fully private in your browser.
Drag & drop your PDF here
or
Single PDF file · Processed in your browser
Live preview, page 1 · drag to reposition · use the handle to rotate
Add Watermark stamps your own text, such as CONFIDENTIAL, DRAFT or your company name, across every page of a PDF. Choose the color, how transparent it is, the font size, rotate it to any angle with the angle slider, and pick a single centered mark or tile it across the page. Everything runs locally in your browser using pdf-lib, so your document is never uploaded and the original content stays exactly as it was.
Adding a watermark to a PDF is a fast way to protect and label your documents. Type the text you want, whether that is CONFIDENTIAL, DRAFT, SAMPLE or your company name, then fine-tune the color, opacity, size and angle until it looks right in the live preview. Choose a single centered stamp for a subtle mark or tile it across the whole page for stronger protection, and the same watermark is applied consistently to every page in one click.
Because the watermark is added in your browser with the open-source pdf-lib library, your file never leaves your device and nothing is stored on a server. That makes it a safe choice for contracts, proposals, invoices and other sensitive paperwork. It works on Windows, macOS, Linux, Android and iOS in any modern browser, so you can watermark a PDF online on your laptop or stamp one on your phone without installing an app or creating an account.
Reviewed by the ToolBrainy Team · Files are processed 100% in your browser · Last updated July 2026
Drag & drop or choose a single PDF file.
Set the text, color, opacity, size and layout.
Stamp every page and save your PDF.
Watermarking happens locally, nothing uploaded.
See exactly how it looks before saving.
Only the watermark is added, nothing else changes.
No signup, no limits and no forced badges.
Mark sensitive files as CONFIDENTIAL.
Label work-in-progress as DRAFT.
Stamp your company name on every page.
Discourage unauthorized reuse.
Mark previews as SAMPLE or SPECIMEN.
Tag files as APPROVED or PAID.
Any short text you like, for example CONFIDENTIAL, DRAFT, SAMPLE or your company name. It is applied to every page.
Yes. Set the color, opacity and font size, drag the angle slider to rotate it to any angle, and choose a single centered mark or tile it across the whole page.
No. Only the watermark is drawn on top, the existing content of every page is left untouched.
Yes. Everything runs in your browser using pdf-lib, your file is never uploaded to a server.
Yes, it is completely free with no signup, no limits and no forced badges. You can watermark as many PDFs as you like.
No. The tool runs entirely in your web browser, so there is nothing to download or install. It works in any modern browser such as Chrome, Firefox, Edge and Safari.
Yes. The tool works in mobile browsers, so you can watermark a PDF on your phone or tablet the same way you would on a desktop.
This tool adds watermarks rather than removing them. Once you save, the watermark becomes part of the PDF, so keep your original file if you later need a clean copy.