Adding a watermark to a PDF is a reliable way to indicate document ownership, restrict unauthorized distribution, or simply brand your files. We’ve evaluated five popular PDF watermarking tools based on their actual features, ease of use, and best-fit scenarios.

1. PDFasset

Key Features:

• Supports both text and image watermarking.
• Customizable font, color, transparency, and position.
• Allows batch processing for multiple files.

Best For:
Users who need to quickly add watermark to PDF in bulk — ideal for corporate document protection and institutional branding.

2. Sejda

Key Features:

• Offers text/image watermark options with fine-tuned font and style settings.
• Customizable opacity, rotation, and placement.
• Free tier allows 3 tasks/day, max 50MB per file.

Best For:
Designers or content teams requiring high control over watermark appearance, within light daily use.

3. iLovePDF

Key Features:

• Allows both text and logo watermarks.
• Customize size, rotation, and location.
• Supports batch upload and editing.

Best For:
Users who frequently deal with multiple files and want a flexible watermarking solution.

4. Smallpdf

Key Features:

• Easy-to-use tool with text watermark support.
• Customizable color and size options.
• Limits to 2 tasks/day for free users.

Best For:
Occasional users who need a quick, no-fuss way to add watermark to PDF.

5. PDF24

Key Features:

• Text watermarking with adjustable transparency and placement.
• Offers a desktop version for offline use.
• No usage limits or file size restrictions.

Best For:
Heavy users concerned about privacy or needing offline watermarking tools.

Final Recommendation

If you’re looking for a fast, intuitive, and efficient solution, PDFasset stands out for its smooth experience and batch watermarking support. For more customized visual control, Sejda and iLovePDF are solid picks. Meanwhile, Smallpdf and PDF24 serve well in specific, limited-use or offline scenarios.

Choosing the right tool depends on your workflow, volume, and design expectations. For consistent, secure watermarking, PDFasset is a dependable option.