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Files never leave your device • 100% Private Client-Side Processing

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45° diagonal watermark

Perfect center alignment

No file size restrictions

How to Add Watermark to PDF

Watermark your PDF documents in 4 quick steps

Click "Browse PDF Files" or drag and drop your PDF into the drop zone.

Choose between Text Watermark or Image Watermark (logo).

Set text, font size, Tirchha 45° angle, opacity, and color.

Click "Add Watermark & Download" to download your watermarked PDF file instantly.

Frequently Asked Questions

Is adding watermarks to PDF free on Pro CSC Tools? ▼

Yes! It is 100% free with no file limits, no sign-up required, and no hidden subscriptions.

Are my PDF documents secure and private? ▼

Yes, 100%! All processing happens locally in your web browser. Your files are never uploaded to any server.

What is Tirchha style watermark? ▼

Tirchha style adds a diagonal watermark at a 45° angle across the center of your PDF pages, perfect for CONFIDENTIAL or DRAFT stamps.

Can I add an image logo as a watermark? ▼

Yes! Switch to the Image Watermark tab and upload your PNG or JPG logo file.

Does it watermark all pages of the PDF? ▼

Yes! The watermark is applied across all pages of your PDF document automatically.

Add Watermark to PDF Online Free

How to Add Watermark to PDF