How to add a watermark to a PDF
Protecting a document against unauthorized copying or making its status clear (“CONFIDENTIAL”, “DRAFT”) is simple. Learn how to stamp text, dates, logos, or tiled patterns directly in your browser without paid licenses or uploading sensitive data to remote servers.
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Choose between text/stamp or image/logo
If you just need to classify the PDF, quick text stamps like “CONFIDENTIAL”, “COPY” or “Today's date” are ideal and apply instantly. For corporate proposals or quotes, select your PNG logo with a transparent background.
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Configure the watermark with live interactive preview
- Open Watermark PDF and select or drag your file.
- Type your text or upload your logo, and choose your color from the palette or the custom color picker.
- Choose placement: repeating tiled pattern (with horizontal and vertical shift controls) or one of 9 fixed quadrant positions with fine adjustment.
- Adjust rotation (45°, 90°, etc.), size, and recommended opacity (around 20%-30% to keep contents legible).
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Choose which pages to stamp or exclude specific pages
You can stamp all pages, only the current page, or a range like “1, 3-5”. Plus, browsing through pages in the viewer lets you click “Remove watermark from this page” to exclude cover sheets or specific pages without affecting the rest.
Tips for professional results
- 45° Tiled pattern: The most secure method against unauthorized copies or screenshots, covering the entire page even if cropped.
- Subtle opacity (25% - 35%): Makes the watermark unmistakable while keeping text and numbers easy to read.
- Use transparent PNG for logos: Avoid solid white boxes by always exporting your logo with transparency in PNG format.
Absolute privacy for your documents
- 100% in your browser: The PDF is never sent to any web server or stored in remote databases.
- Confidential files remain safe: Watermark contracts, payroll slips, invoices, and ID cards with total confidence.
- No limits or promo watermarks: JapalTools never adds advertisements or limits the number of pages you can process.
Your document never leaves your device: JapalTools processes it in your own browser and never uploads it to any server, which matters when it contains personal or tax data.