Preview shows page 1. Watermark will be applied to all pages.
How to Use
- Drop your PDF file onto the upload area or click to select it.
- Type your watermark text โ for example, 'CONFIDENTIAL', 'DRAFT', or your company name.
- Adjust font, size, color, opacity, rotation, and position as needed.
- Check the live preview of page 1, then click Apply Watermark.
- Download the watermarked PDF โ all pages are stamped automatically.
Features
100% Private
Powered by pdf-lib running in WebAssembly. Your PDF never leaves your device.
Full Customization
Control text, font, size, color, opacity, rotation, and position.
Live Preview
See exactly how the watermark will look before applying it.
All Pages at Once
The watermark is stamped on every page of multi-page PDFs automatically.
Free & No Sign-up
No account, no credit card, no limits. Just upload, configure, download.
Works on Any Device
Desktop or mobile โ any modern browser handles it with no app install.
Use Cases
FAQ
Is my PDF uploaded to a server?
No. Processing runs entirely in your browser using pdf-lib. Your file stays on your device at all times.
Can I watermark all pages at once?
Yes. The watermark is applied to every page in the PDF automatically โ no need to specify individual pages.
Can I choose the watermark position?
Yes. The 3ร3 position grid lets you place the watermark in any of 9 positions โ corners, edges, or center.
What font options are available?
Helvetica, Helvetica Bold, Times Roman, and Courier. These are standard PDF fonts that embed reliably in all viewers.
Will the watermark affect existing content?
No. The watermark is drawn as a transparent layer on top. All existing text, images, and structure remain intact and readable.