About this tool
Watermark PDF places text or image marks over selected document pages. Text mode starts with CONFIDENTIAL and provides font size, gray, red, blue, or black color, opacity, horizontal or 45-degree diagonal orientation, and centered or tiled layout. The first affected page updates as these controls change.
Image mode accepts PNG, JPG, WebP, and other image formats the browser can decode, converting non-JPEG inputs to transparent PNG data when appropriate. Set the image width as a percentage of the visible page and choose centered, tiled, or corner placement. Page ranges allow the mark to target only part of a document.
How to use the Watermark PDF
- 1Open the PDF that needs a watermark.
- 2Choose text or image watermark mode.
- 3Adjust appearance, opacity, angle, and layout.
- 4Select every page or enter a range.
- 5Apply and download the watermarked PDF copy.
Features
Text watermark controls
Set custom wording, 24 to 120 point type, four colors, adjustable opacity, and horizontal or diagonal orientation.
Flexible image marks
Use a browser-readable logo or stamp image and scale it from ten to one hundred percent of page width.
Centered and tiled layouts
Place one prominent mark in the middle or repeat smaller marks across the visible page area.
Image corner placement
Anchor an image watermark near any of the four visible page corners with a consistent inset.
Selected-page application
Validate a page expression and draw the watermark only over pages included in that ordered selection.
Frequently asked questions
Can a watermark be applied to only one PDF page?
Yes. Switch Pages from All to Range and enter that page number. The same field also accepts multiple pages and ranges when several nonconsecutive sections need marking.
What image formats can become watermarks?
PNG, JPG, and WebP are listed directly, and another image type may work when the current browser can decode it. Browser-decoded non-JPEG images are converted through a canvas before embedding.
How does the tiled watermark layout work?
Tiled mode repeats six marks in a regular arrangement across each affected page. Text and image modes use the same visible-page grid while preserving each mark's proportions.
Are watermarks positioned correctly on rotated pages?
Yes. Placement uses the visible crop box and page rotation, then maps the reader-facing location back into PDF coordinates so the mark follows the viewed page.
Does watermarking transmit the document?
No. Preview rendering, page selection, image conversion, watermark drawing, and PDF saving are performed on the device running the browser.