Add Watermark to PDF
Add text watermarks to all or selected PDF pages
How to Use Add Watermark to PDF
- Upload the PDF you want to mark.
- Enter your watermark text, such as CONFIDENTIAL or DRAFT.
- Choose a position — Centre, Diagonal or Tiled — and adjust size, colour, opacity and rotation.
- Watch the live preview of page one update as you change settings.
- Choose whether to apply to all pages, the first page only, or a custom range, then process.
About Add Watermark to PDF
What this page solves
Add Watermark to PDF solves the privacy and friction problem of typical online tools — it never uploads, never asks for a signup, and runs in your browser.
Add Watermark to PDF is a free, privacy-first PDF utility that lets you add text watermarks to all or selected pdf pages entirely in your browser. Unlike most online PDF services, Add Watermark to PDF never uploads your documents — every page is parsed, modified, and re-saved locally using pdf-lib and the browser's built-in capabilities. That makes it a safe choice for confidential files such as contracts, invoices, medical records, tax forms, or signed agreements that should never touch a third-party server. Output PDFs are clean: no watermark, no "Made with X" footer, no metadata injected into the document properties. Add Watermark to PDF handles scanned PDFs (image-only pages) and digital-native PDFs identically, so you don't need to figure out which kind of document you have before starting. Add Watermark to PDF uses `pdf-lib` under the hood — the same library powering many open-source PDF tools — so the output PDFs open correctly in Acrobat, Preview, browser viewers, and printer drivers. Add Watermark to PDF follows a clean four-step workflow (Upload → Edit → Process → Download) inspired by the best desktop PDF apps and is part of our broader PDF Tools collection. If you also need a complementary utility, try our PDF Merger. It is free with no signup, no watermark, and no page count limits beyond what your device can handle.
Common Use Cases
- Process confidential business documents without uploading them
- Prepare contracts, invoices, or signed agreements before sharing
- Edit scanned documents and forms locally on your device
- Combine PDF tools in a chain — output of one becomes the input of the next
- Handle large or sensitive PDFs that exceed typical online upload limits
- Preparing tender or RFP responses where multiple PDFs need to merge into one bundle
- Handling a one-off task on a borrowed or public machine where installing software is not an option
- Reducing a thesis or dissertation PDF to fit a university submission size cap
Related tools in PDF Tools
- PDF MergerCombine multiple PDF files into one document
- PDF SplitterSplit a PDF into multiple files by page ranges
- PDF Page ExtractorExtract specific pages from a PDF into a new file
- PDF Page RemoverRemove unwanted pages from PDF files
See all PDF Tools.
Frequently asked questions
Can the watermark be removed by someone else?
It can be obscured or worked around by anyone with PDF editing software, since the text is drawn into the page content rather than protected. Treat it as a visible ownership marker and deterrent, not as protection. For actual restriction, use PDF Encrypt with permission flags.
Why is my watermark hard to read?
Either opacity is too low or the colour is close to the page content beneath it. Raise opacity toward 30%, or switch to a colour that contrasts with the document — grey works well on white pages with black text.
Can I use an image or logo as a watermark?
This tool handles text watermarks. To place a logo, use Add Image to PDF, which lets you position an image and set its opacity.
Will the watermark appear when printed?
Yes. It becomes part of the page content, so it prints exactly as it appears on screen.
Can I watermark only some pages?
Yes. Choose the custom option and enter the page numbers you want marked. This is useful when only an appendix or specific section needs marking.
How to use Add Watermark to PDF?
1) Open the tool. 2) Enter or upload your input. 3) Get your result instantly. Everything happens locally — nothing is uploaded.
When should I use Add Watermark to PDF?
Use Add Watermark to PDF whenever you need a fast, private, browser-based way to add text watermarks to all or selected pdf pages.
Is Add Watermark to PDF safe?
Yes. Add Watermark to PDF runs 100% in your browser. Inputs are never uploaded, stored, or logged — safe for confidential content.
Will quality be affected by Add Watermark to PDF?
No quality loss for text and vector content. Embedded images keep their original resolution unless you compress them.
What formats does Add Watermark to PDF support?
Add Watermark to PDF supports PDF (any version), with import/export to JPG, PNG and TXT in related tools
Is Add Watermark to PDF free?
Yes — Add Watermark to PDF is completely free, with no registration, no watermarks, and no usage limits.
Is my PDF uploaded to a server?
No. Add Watermark to PDF processes PDFs entirely in your browser using pdf-lib. Your documents never leave your device.
Are there file-size or page limits?
There are no enforced limits. Performance depends on your device — files up to about 100 MB process smoothly on most modern browsers.
Will the output have a watermark?
Never. Add Watermark to PDF produces clean PDFs with no added branding, watermarks, or metadata.
Is Add Watermark to PDF safe for confidential documents like contracts and medical records?
Yes. Add Watermark to PDF processes PDFs entirely in your browser using pdf-lib. The document never leaves your device — no upload, no server-side temp file, no audit-log entry. You can verify in DevTools → Network: zero outbound traffic after the page loads.