Stamp confidential markers, draft notices, company logos, or copyright watermarks across all pages with custom opacity, angles, and colors.
Follow these simple steps to process your document privately in seconds.
Load the PDF you wish to watermark into the workspace.
Open the Watermark dialog from the Organize menu and customize your text, font, opacity, and rotation.
Apply the watermark to your pages and download the watermarked PDF immediately.
Add text stamps (e.g. 'CONFIDENTIAL', 'DRAFT', 'SAMPLE') or upload transparent PNG company logos.
Adjust rotation angle (-45° to 90°), transparency percentage, font size, and color to prevent obscuring document text.
Apply the watermark universally across all pages or specify selected page ranges.
Choose whether the watermark appears as an overlay on top of text or as a background underlay.
Preview exact watermark positioning and scale on actual document pages in real time.
Watermarking is computed in browser memory using pdf-lib, ensuring total data privacy.
Your PDF is processed directly on your computer using WebAssembly and HTML5 Canvas technology. At no point during viewing, editing, or exporting is your file transmitted to external servers. Review our Security Architecture or read our verified Privacy Policy.
Yes, you can set the opacity from 10% to 100% to create subtle background watermarks that keep text readable.
Yes, you can specify individual page numbers or ranges during configuration.
Instant browser workspace. No registration, no watermarks, and 100% private.
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