Add Watermark Online — Free & Instant

Add text or image watermarks to PDF files online for free. Custom position, opacity and style. Instant download.

💧Add Watermark — Free, No Signup

How to add watermark in 4 steps

Upload your PDF file
Type your watermark text (e.g. "CONFIDENTIAL", "DRAFT") or upload an image
Adjust position, opacity, rotation, and size
Download the watermarked PDF

Why add watermark your PDF?

Watermarks protect intellectual property, mark documents as drafts or confidential, and identify ownership. Essential for sharing proofs, previews, and proprietary documents.

Tips for best results

Set opacity to 20–30% for a subtle background watermark
Diagonal placement at 45° is the most tamper-resistant layout
Use a logo image watermark to brand your PDF documents

Related PDF tools

🔒Protect PDF 🔓Unlock PDF ✍️Sign PDF 🚿Remove Watermark

Frequently asked questions

Is Add Watermark free to use?+

Yes. Add Watermark is free for files up to 25MB with up to 3 tasks per day. Upgrade to Pro for unlimited use.

Do I need to create an account?+

No account is needed for free tasks. Sign up to unlock more daily tasks and larger file sizes.

Is my file secure?+

All files are encrypted during transfer and automatically deleted 1 hour after processing. PDFKit never accesses your document content.

Does this work on mobile?+

Yes. PDFKit is fully optimised for iOS and Android browsers. No app download required.

🔒 HTTPS encrypted🕐 Files deleted in 60 minutes🚫 Never read by humans✅ Free, no signup required