PDF and document tools

PDF Watermarker

PDF Watermarker

Ready

Source PDF document

Local processing

Your document stays on this device. Processing runs in browser memory, and very large files depend on the RAM available in your browser.

Watermarked document summary

No PDF file loaded yet. Drop a file or click "Load example" to start.

Local processing

Press Ctrl or Command and Enter to run the tool.

About this tool

About this tool

PDF Watermarker overlays custom text watermarks onto PDF document pages using client-side JavaScript without sending files over the network.

Add confidential notices, draft stamps, and copyright warnings across every page of your PDF documents. Configure diagonal or center placement, transparency, and color while processing files securely in browser memory.

Built for daily work

  • Stamp DRAFT across preliminary project proposals before review.
  • Mark internal financial reports with CONFIDENTIAL watermarks.
  • Add copyright notices to downloadable PDF eBooks.
  • Stamp COPY across duplicate legal invoices.

How to use this tool

How to use this tool

1

Select your PDF document

Upload the PDF file that requires attribution or status stamping.

2

Enter watermark text and styling

Type text such as CONFIDENTIAL or DRAFT, select diagonal or center placement, and adjust transparency.

3

Run the watermarking tool

Click Apply watermark to stamp the text across every document page in memory.

4

Download the watermarked PDF

Save the stamped document directly to your local computer.

Key features

Key features

Customizable text stamp

Overlay any copyright notice, company name, or draft warning across your document.

Diagonal and center layouts

Stamp text diagonally across the page or position it cleanly in corners.

Adjustable opacity level

Set transparency between 5% and 100% so text remains readable beneath the watermark.

Local browser confidentiality

Your documents are never transmitted to external servers.

Practical use cases

Practical use cases

  • Stamp DRAFT across preliminary project proposals before review.
  • Mark internal financial reports with CONFIDENTIAL watermarks.
  • Add copyright notices to downloadable PDF eBooks.
  • Stamp COPY across duplicate legal invoices.

Private by default

For local tools, input is processed in your browser and is not sent to application analytics.

Data processing notice

Technical details

Technical details

Input formatsPDF
Output formatsPDF
ProcessingLocal browser PDF content stream stamping
Task controlsWatermark text, position, opacity slider, font size, color selector
Maximum local file25 MB per PDF file
Workspace featuresMulti-page batch stamping, local export

Limitations and important notes

Limitations and important notes

  • Password-protected files must be unlocked prior to watermarking.
  • Always review watermark legibility across different page backgrounds.
  • Keep original un-watermarked PDFs as primary archives.

Frequently asked questions

Frequently asked questions

Related guides and solutions

Related guides and solutions

Browse all guides

Add a watermark to a PDF

Drafts and internal documents travel safer with a visible watermark. The [PDF watermark tool](tool:pdf-watermark) stamps text or an image onto every page locally, with full control over position and opacity.

Learn more

Combine confidential PDF documents locally without server uploads

Assembling contracts, financial records, and legal reports should never expose sensitive data to remote servers. Merge PDF files entirely in your browser memory with the [PDF merger](tool:pdf-merger).

Learn more

Reduce PDF file sizes locally without uploading confidential reports

Bulky PDF documents exceed email attachment limits and slow down webpage downloads. Compress PDF files directly in your web browser without exposing data to external servers with the [PDF compressor](tool:pdf-compressor).

Learn more

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