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Watermark PDF Online
Mark a PDF with diagonal or level text, a tiled watermark, or your own PNG/JPG logo stamp — set transparency, size and which pages it appears on, preview it, then download.
How to use Watermark PDF
- Add one PDF
- Choose text or image, type your words or pick a logo
- Set position, tiling, size, colour and transparency
- Preview, then download the watermarked PDF
Good to know
- Light grey at low opacity reads as a watermark without hiding the content.
- Use first-page-only for a logo stamp on a cover, and all pages for CONFIDENTIAL-style marks.
- A watermark added here is drawn onto each selected page; a determined editor with the right tools could still remove it, so do not rely on it as sole protection for sensitive files.
Frequently asked questions
Can I tile the watermark across the page?
Yes. Text watermarks can repeat in a tiled grid, or sit once in the centre — diagonal or horizontal.
Which images can I stamp?
PNG and JPG logos work. Transparent PNGs keep their transparency in the exported PDF.
Does it apply to every page?
You choose: all pages, first page only, or last page only.
Input: PDF (.pdf) + optional PNG/JPG · Output: PDF (.pdf)
Related tools
Note: the mark is drawn onto each selected page. It deters casual reuse, but a determined editor could remove it — do not rely on a watermark alone to protect sensitive files.
Drag & drop one PDF, or click to browse
Local only — never uploaded.
Processed locally in your browser. Closing this tab clears everything.