Add a watermark to a PDF
Files never leave your deviceType the watermark, such as CONFIDENTIAL, DRAFT or "Copy for bank KYC only", set the size, angle and opacity, and stamp it on every page. Repeating it across the page makes a shared copy harder to misuse.
How to use it
- Drop the PDF.
- Type the text and choose size, opacity, angle, colour and whether to repeat it.
- Press Add watermark and download.
Details
- Text
- Any text up to 60 characters. Latin text is vector Helvetica Bold; other scripts (Hindi, Arabic, CJK) are drawn with your system font as an image
- Style
- Size 16–140 pt, opacity 5–90%, angle 0°, 45°, −45° or 90°, grey, red or blue, single or repeated
- Placement
- Centred on every page, upright relative to how the page is displayed
- Engine
- pdf-lib, downloaded once and run in this tab. Text, links and bookmarks are kept
Questions
Are my files uploaded?
No. The page loads its code once, then reads and processes your files inside the browser tab. Nothing is sent to a server; you can confirm it in your browser's network panel while a file is processed.
Why watermark ID copies?
Writing the purpose and date on a copy of an ID or bank document, for example "For flat rental only, Nov 2026", makes it harder to reuse for something else. Repeating the text across the page makes it harder to crop out.
Can the watermark be removed?
Someone with a PDF editor can remove an added watermark object. For stronger protection, also add a password with editing disabled using Protect PDF.
Can I use an image or logo?
Not yet; this version stamps text.