Add watermark to PDFfree & no upload
Stamp your PDF with custom text — CONFIDENTIAL, DRAFT, DO NOT COPY, or anything you choose. Runs entirely in your browser with no file upload.
Use any watermark text: CONFIDENTIAL, DRAFT, your company name, or anything else.
Choose position, font size, and opacity to get the look you need.
Your PDF stays on your device. All processing runs locally in your browser.
Frequently Asked Questions
Can I choose where the watermark appears?
Yes. You can place the watermark diagonally across the center of each page, or position it in any corner.
What font size should I use?
For a diagonal center watermark, 48–72pt works well for A4/Letter PDFs. For corner watermarks, 20–30pt is typically appropriate.
Does it work on scanned PDFs?
Yes. The watermark is added as a text layer on top of each page, so it works on all PDFs including scanned documents.
Is there a page limit?
No. The tool processes all pages in your PDF regardless of page count.
Use our free online PDF watermark tool to add text watermarks to PDF files, stamp PDFs with CONFIDENTIAL or DRAFT labels, and protect documents before sharing. This browser-based PDF stamping tool lets you watermark PDF pages without uploading your file to any server. Perfect for marking contracts, reports, and sensitive documents.