How to watermark pdf files
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Upload your PDF
Select the PDF you want to watermark.
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Enter watermark text
Type your watermark text — e.g. 'CONFIDENTIAL', 'DRAFT', your company name, or any custom label.
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Customize appearance
Adjust opacity, font size, and angle to get the look you want.
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Download the watermarked PDF
Click Apply and download your PDF with the watermark baked in permanently across all pages.
Why SecurePDFSuite is Different
Unlike SmallPDF, ILovePDF, or Adobe Acrobat online tools, SecurePDFSuite never uploads your files to a server. Everything runs directly in your browser using local memory. Your documents stay on your device — nothing is transmitted, nothing is retained, and nothing is logged.
This makes SecurePDFSuite the right choice for sensitive documents: legal files, medical records, financial statements, or any content you wouldn't want sitting on a third-party server.
Frequently Asked Questions
- Can I control watermark opacity and angle?
- Yes. You can set the transparency level (e.g. 20–60% opacity) and the rotation angle of the text so it appears as a diagonal stamp or straight overlay.
- Is the watermark permanent?
- Yes. The text is rendered directly onto the PDF page as a fixed element. It cannot be removed by a standard PDF reader — recipients would need specialized tools.
- Can I add different watermarks to different pages?
- The current tool applies the same watermark uniformly across all pages. For per-page watermarks, process the PDF in sections using the Split tool first.