Text, logo, or image
Create a vector-text watermark with built-in PDF fonts, or embed a transparent PNG, logo, stamp, seal, or JPG once and reuse it across the selected pages.
All tools
PDF edit tool · Browser private
Watermark PDF
Stamp custom text, a logo, PNG, or JPG over all or selected pages. Preview the placement, keep original page content intact, and download only after structural verification.
Your files never leave this browser
Add a PDF to watermark
Stamp text, a logo, or another PNG/JPG over selected pages while keeping the original PDF content intact.
One PDF · 75 MB maximum · 500 pages · browser only
How it works
A clear mark, placed with intention.
Choose the source, target exact pages, and preview the stamp before creating a structurally verified PDF.
- 01
Open one PDF
Choose a PDF up to 75 MB and 500 pages. Toolkit validates the structure and renders the pages locally for preview.
- 02
Build the watermark
Enter custom text or choose a PNG/JPG image, select the target pages, then adjust position, size, opacity, rotation, color, typography, and margins.
- 03
Verify and download
Toolkit stamps the selected pages, reopens the output to verify page count, dimensions, and rotation, then downloads the finished PDF.
Built for document handoff
Flexible watermarks without flattening the PDF.
Exact page targeting
Apply a watermark to every page, only odd or even pages, or custom ranges. Nine positions, custom margins, rotation, scale, and opacity make the placement predictable.
Private structural output
PDF.js previews and pdf-lib edits the document in browser memory. Existing page content is not flattened or recompressed, and nothing is sent to a PDF backend.
Watermark PDF questions
Logos, page ranges, privacy, security, Unicode, and document features.
Can I add my logo to a PDF?+
Yes. Choose PNG or JPG, upload a logo up to 10 MB and 40 megapixels, then set its page-width percentage, position, rotation, opacity, and page range. A transparent PNG is usually best for a logo.
Can I watermark only certain pages?+
Yes. Choose all, odd, or even pages, or enter custom ranges such as 1-3, 7, 10-12.
Does the watermark replace or flatten my PDF pages?+
No. Text is added as vector PDF text and PNG/JPG data is embedded over the existing page. Original selectable text, vectors, and images are not turned into a screenshot or recompressed.
Does a watermark protect the PDF from copying?+
No. A visible watermark can communicate ownership, status, or confidentiality, but it is not encryption, access control, secure redaction, or a guarantee that editing is impossible.
Are my PDF and logo uploaded?+
No. Both stay in browser memory. The application server only provides the static JavaScript needed to run the workspace.
Can I use emoji or any language in a text watermark?+
This lightweight version uses the four standard PDF fonts for dependable browser-only output. Those fonts support common Latin letters, numbers, and punctuation, but not every Unicode character. Use a PNG image when you need a custom script, branded typeface, or complex symbol.
What happens to forms, bookmarks, and signatures?+
The tool modifies the original document instead of rebuilding it page by page, so advanced features have a better chance of remaining intact. However, rewriting a complex PDF can still affect some features, and all existing digital signatures become invalid.
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