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Protect your PDF files by applying text or image watermarks. Adjust transparency, size, and positions locally inside browser memory.
Choose a PDF document to overlay security stamps.
Protecting your intellectual property and indicating document status is vital in digital distributions. Our Add Watermark to PDF tool helps you overlay customized text stamps or image graphics onto your PDF pages. Whether you need to mark a document as "DRAFT", "CONFIDENTIAL", "COPYRIGHTED", or place a corporate logo on every page, our tool offers a clean, client-side solution to secure your PDFs from unauthorized copying and clearly define their distribution status.
Unlike server-based online converters that put your documents at risk, our tool processes all binary structures locally. By utilizing local rendering threads, it places watermark assets directly onto the page drawing streams. You can customize text content, adjust rotation angles, configure opacity levels for transparent overlays, select fonts, and choose whether to place watermarks on top of or behind the document content.
Step 1: Choose your PDF document by dropping it onto the file area or clicking the selection button.
Step 2: Select the watermark type: either "Text Watermark" for custom phrases or "Image Watermark" to upload an image logo.
Step 3: Customize text parameters like font size, opacity, rotation angle, text color, and placement position.
Step 4: If using an image, adjust the scaling size, opacity slider, and coordinates to place it exactly where you want.
Step 5: Choose your output filename, click "Add Watermark to PDF Now", and download your watermarked file.