Add Watermark to PDF
Stamp a simple text watermark onto all or selected pages — locally, without uploading.
Processed on your device. Your files are not uploaded.
Add Watermark to PDF workspace
No file selected yet.
Up to 80 characters · Helvetica only · no image watermarks
Preview: "CONFIDENTIAL" · center · 48pt · 35% opacity · -45° · all pages
How to use
- Choose a PDF file using Choose PDF file or drag and drop.
- Enter watermark text and choose position, size, opacity, and rotation.
- Apply to all pages or enter a page range.
- Select Add watermark and download the PDF. Nothing is uploaded.
About this tool
Add Watermark overlays Helvetica text while preserving original page content. It is designed for light labeling such as “CONFIDENTIAL”, not advanced typesetting.
Frequently asked questions
- Are my PDFs uploaded?
- No. Watermarking runs in your browser with pdf-lib. Files are not uploaded.
- Can I upload a custom font or image watermark?
- No. This tool uses built-in Helvetica text only. Image watermarks and custom font uploads are not supported.
- Can I remove an existing watermark?
- No. This tool only adds a simple text overlay. It does not remove watermarks.
- Which rotations are available?
- 0°, 45°, and −45°. Placement adapts to common page sizes.