PDF Watermark
Upload a PDF, enter a watermark text, and stamp it diagonally across every page.
Choose PDF
or drag and drop it here
Choose a PDF file to add a watermark to it.
Your files are processed locally in your browser. They are not uploaded to our servers.
How to use
- Choose a PDF file from your device.
- Enter the watermark text you want, for example CONFIDENTIAL or DRAFT.
- Click Apply watermark, then download the watermarked PDF.
What is this tool?
PDF Watermark draws a large, semi-transparent, diagonal text watermark across every page of an uploaded PDF using pdf-lib. Everything happens locally in your browser, so the file is never uploaded anywhere.
Common uses
- Marking a document as CONFIDENTIAL or DRAFT before sharing it
- Adding a SAMPLE watermark to a preview version of a document
- Labeling internal documents before they're distributed
- Marking a contract copy as NOT FOR SIGNATURE
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FAQ
Can I change the watermark text?
Yes, type any text you like into the watermark field before applying it.
Does the watermark cover the existing content?
It's drawn with reduced opacity so the original content stays fully readable underneath.
Is my PDF uploaded to a server?
No, everything is read and rewritten entirely in your browser using pdf-lib — your file is never sent anywhere.