Add Watermark to PDF

Add a text watermark to every page of your PDF. Customize text, opacity, and rotation angle.

Drop files here or click to upload

.pdf · Max 20 files

Or paste files with Ctrl+V

Your files never leave your browser

What is PDF Watermark?

Watermark PDF adds a text watermark (for example "DRAFT" or "CONFIDENTIAL") behind or over each page. Adjustable opacity, font size, colour, rotation and position.

How to use PDF Watermark

Drop one or more PDFs (up to 20 at a time).
Type the watermark text and tweak appearance options.
Click "Apply Watermark".
Download the watermarked PDFs.

Why use AinnoBox

100% browser-based — your file is never uploaded to a server
No file size limits imposed by us; only your device memory
Free with no sign-up, no email, no watermark on output
Works offline once the page is loaded
Strict Content Security Policy and HTTPS by default

Want to understand why AinnoBox processes everything in the browser rather than on servers? Read How It Works or check the FAQ.