Add a Text Watermark to PDF Pages
Watermark PDF pages with custom text, opacity, rotation angle, and placement directly in your browser. Your files never leave your device.
Up to 50 MB per file (10 files per batch) on the Free plan. You can also paste a file from your clipboard.
About Watermark PDF & Edge Cases
Overlay diagonal, centered, or tiled text or image watermarks across your PDF pages with adjustable opacity, rotation angle, and font size. Watermark PDF draws semi-transparent vector text or embedded PNG/JPG graphics across target page streams in @cantoo/pdf-lib.
- Tiled mode repeats your watermark across a grid on every page to deter unauthorized cropping of confidential drafts.
How Watermark PDF Works
- 1
Step 1
Select your PDF in the Watermark PDF workspace.
- 2
Step 2
Enter your watermark text (such as CONFIDENTIAL or DRAFT), placement mode, rotation angle, and opacity.
- 3
Step 3
Apply the watermark locally and download your stamped PDF.
Plan Limits for Watermark PDF
Rendered directly from our active plan configuration. No hidden caps before your first download.
| Limit | Free ($0) | Day Pass ($4.99) / Pro ($4.00 / month) |
|---|---|---|
| Maximum file size | 50 MB | 500 MB |
| Maximum files per batch | 10 files | 200 files |
| Processing location | On your device | On your device |
Frequently Asked Questions
- Can I adjust the transparency of the watermark?
- Yes. Use the opacity slider to make the watermark subtle behind body text or bold across the page.
- Does Watermark PDF upload my files to a server?
- No. Watermark PDF is a local browser tool. Your file bytes stay on your device, and you can verify zero file uploads in your browser Network tab.
- What are the file size and batch limits for Watermark PDF?
- On the Free plan, you can queue up to 10 files per batch and up to 50 MB per file. The 24-Hour Day Pass and Pro plans support up to 200 files per batch and 500 MB per file.
Related PDF Tools
- Add Page Numbers to PDFAdd page numbers to PDF files with configurable position, font size, starting page, and margin alignment. Processed locally on your device.
- Protect PDFProtect PDF documents with AES-256 password encryption and optional permission controls directly in your browser. Files never leave your device.
- Sign PDFAdd your visual signature, initials, and date stamp to PDF documents locally in your browser. Draw with pointer smoothing, type, or upload an image.
- Edit PDFEdit PDF files directly in your browser: add text boxes, cover existing text with whiteout, highlight, draw shapes, insert images, and export flattened.