All tools
Add watermark
Stamp text across your pages with custom opacity, angle and position.
Choose a fileLoading the tool…
Mark documents as Confidential, Draft or Copy, or add your name. A live preview shows exactly how the watermark will look before you save.
How to add a watermark to a PDF
- Choose your PDF.
- Type the text and adjust font, color, opacity, angle and position.
- Click “Add watermark” and download.
Frequently asked questions
Can I watermark only some pages?
Yes. Choose “Some pages” and enter page numbers or ranges.
Is it really free?
Yes. There is no sign-up, no daily limit and no watermark added to your files.
Are my files uploaded to a server?
No. ModifyPDF processes files with JavaScript inside your browser. Your documents never leave your device, and nothing is stored after you close the page.