Watermark PDF

Use this free Watermark PDF online tool to protect or brand your PDF files with text and image watermarks. It is built for students, teams, and professionals who need a clean result quickly. Upload, process, and download in a few clicks. Up to 50 MB per file.

Secure TLS/SSL encryption 100% free, no signup Fast browser-based processing
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Drag & drop your files here

or click to browse from your device

Supported formats: .pdf (Max size: 50MB)

๐Ÿ”’ Secure temporary processing. Files are auto-deleted after 30 minutes.

Uploading file contents...

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Your File is Ready!

The processing step completed successfully. You can download your finalized file below.

๐Ÿ“ฅ Download Processed File

How to Use Watermark PDF

Complete your task in four clear steps.

1

Step 1

Upload your PDF document.

2

Step 2

Select 'Text Watermark' or 'Image Watermark' and customize your inputs.

3

Step 3

Configure position, rotation angle, font size, color, and opacity.

4

Step 4

Click 'Watermark PDF' and download your branded PDF.

Why Choose OptaPDF for Watermark PDF?

  • โœ… Supports both text-based and image/logo-based watermarks.
  • โœ… Fully adjustable transparency, rotation, and alignment grids.
  • โœ… 100% free with no account registrations or forced brand labels.

Security Guarantee

Your upload is protected with TLS/SSL encryption. Files are automatically and permanently deleted from our servers after 30 minutes. We do not read, share, or store your content. OptaPDF works on iOS, Android, Chrome, Safari, Edge, and desktop browsers without an app installation.

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Frequently Asked Questions About Watermark PDF

Get answers to common queries regarding security, speeds, and bounds of this tool.

Upload your PDF, select 'Text Watermark', enter 'CONFIDENTIAL', set rotation to 45 degrees, reduce opacity to 30%, and click watermark.
Yes! Our 'Image Watermark' option allows you to upload PNG or JPG logos, adjust opacity, and place them on all pages.
Yes, our engine applies your watermark to every single page of the PDF sequentially.
Yes, our opacity slider lets you adjust watermark levels from 10% (very subtle) to 100% (fully opaque).
The watermarked file will follow the naming rule, e.g., x_watermarked.pdf.
Yes! OptaPDF is 100% free with no pricing plans or forced watermarks of our own.
Yes. All uploaded files are processed temporarily in sandbox memory and automatically deleted after 30 minutes.
Yes, you can rotate text watermarks from 0 to 360 degrees to get the perfect angled overlay.
Yes, our responsive page makes watermarking simple on all phone layouts.
We support PDF uploads up to 50MB.