Add Watermark to PDF Online — Free PDF Watermarker
Protecting your intellectual property, branding draft versions, or labeling files as confidential is easy with watermarks. SwiftPDFKit's free online PDF watermarking tool lets you overlay custom text watermarks onto your documents. Adjust font size, text string, rotation angle, and opacity levels to find the perfect balance between visibility and readability.
How to Add Text Watermarks to PDFs
Branding your files is simple with these instructions:
- Upload the PDF document you want to watermark.
- Type your custom watermark text (such as "CONFIDENTIAL", "DRAFT", or your company name) in the input area.
- Configure the placement, rotation, opacity, and size settings.
- Click "Add Watermark" to overlay the text layer.
- Download the watermarked PDF instantly.
Watermarker Tool Features
Our custom watermarker is designed to be highly adjustable:
- Text Customization: Full control over text strings, angles, colors, and opacity sliders.
- Layer Integration: Merges watermarks directly into the PDF rendering layers so they cannot be easily removed.
- Zero Retention: Uploaded files are processed in RAM and permanently deleted immediately.
- Free Access: Add watermarks to your files without subscription limits or sign-up walls.
Why Watermarking is Important
Watermarks act as visual deterrents against copyright theft. By overlaying "DRAFT" or "DO NOT COPY" onto preview versions of documents, you communicate the document status clearly and prevent unauthorized distribution of incomplete work.