PDF Watermark
Add a custom text or logo watermark, choose its position and page range, then download the stamped PDF — free, private, and processed entirely in your browser.
About the PDF Watermark Tool
Watermarking a PDF stamps a text label or logo across its pages — useful for marking a document as confidential or draft, branding a document with your company logo, or deterring unauthorized copies of something you share.
Our free online PDF watermark tool lets you customize the text or image, its color, opacity, rotation, and position — including a repeating tiled grid — and apply it to all, one, or a custom range of pages. Everything runs locally in your browser using the pdf-lib library; your PDF is never uploaded to a server.
How to Add a Watermark to a PDF
Step 1
Upload your PDF
Drag and drop a PDF file, or choose one from your device.
Step 2
Design your watermark
Choose text or a logo, set its color, opacity, and rotation, then pick a position or a tiled grid.
Step 3
Apply and download
Click "Apply Watermark & Download PDF" to stamp your chosen pages instantly.
Frequently Asked Questions
Will the watermark cover important content?
You control the opacity, size, and position, so you can keep it subtle in a corner or make it a bold diagonal stamp — whichever suits your document.
Can I watermark only some pages?
Yes. Choose "First Page Only" or enter a custom range like 1-3, 5 to apply the watermark to just the pages you want.
Can I use my own logo instead of text?
Yes. Switch to Image/Logo mode and upload a PNG, JPG, or WEBP file — you can scale and position it the same way as a text watermark.
Is my PDF uploaded to a server?
No. The watermark is applied entirely in your browser using the pdf-lib library — your document is never uploaded anywhere.