Add a Watermark to a PDF
Add a text watermark to PDF pages: choose the text, position, size, opacity and angle, then export a watermarked copy — all in your browser.
How to use
The whole flow runs in your browser — nothing is uploaded.
- UploadAdd the PDF you want to mark.
- Write the watermarkType the text, then set size, opacity, colour and angle.
- Pick pagesApply to all pages or only the ones you select.
- ExportPress Add watermark and download the new, watermarked PDF.
- Every step runs locally in your browser.
Key Features
Stamp text across your PDF pages with full control. Everything runs client-side on your own device.
- Live previewThe watermark is drawn over the first selected page's thumbnail as you change settings.
- Full controlNine positions, a diagonal mode, size, colour and 5–100% opacity.
- Non-destructiveA new PDF is written; the original file is never changed.
- Local stampingThe watermark is applied with pdf-lib on your device.
Frequently asked questions
Yes. Choose the page selection mode and pick pages from the thumbnails, or type a range.
Yes — pick the diagonal position (or set a custom angle) for the classic centre-to-corner watermark.
No. The tool always creates a new file and leaves your original untouched.
The text is drawn onto the page content, so it is not a layered annotation. Keep your original file if you may need a clean version later.