Watermark PDF – Add Text or Image Watermark to PDF Files Online

About Watermark PDF Tool

The Watermark PDF Tool allows you to easily add text or image watermarks to one or multiple PDF files online. This tool is designed for users who want to protect their documents, add branding, or mark files as confidential by placing a visible watermark on PDF pages. You can upload multiple PDF files at once, customize the watermark appearance, preview the watermark, and download the final watermarked PDFs individually or as a ZIP file.

Your uploaded files are processed securely, and all uploaded and generated PDF files are automatically deleted from the server after 1 hour, ensuring your data remains private and temporary.

What Is a PDF?

A PDF (Portable Document Format) is a widely used file format that preserves document layout, fonts, images, and formatting across different devices and operating systems. PDFs are commonly used for reports, contracts, invoices, manuals, and official documents. Adding a watermark to a PDF helps indicate ownership, authenticity, or document status without modifying the original content structure.

What This Watermark PDF Tool Does

This tool applies a watermark layer to PDF pages without altering the original PDF content. The watermark can be:

• Text-based (such as “Confidential”, “Draft”, or your brand name)

• Image-based (such as a logo or stamp)

You can control opacity, size, rotation, font, page range, and layer position to get exactly the result you want.

Supported File Format

• PDF only

The tool validates PDF files on both the frontend and backend to ensure only supported files are processed.

Key Features of the Watermark PDF Tool

• Upload multiple PDF files at the same time

• Drag & drop or browse to upload PDFs

• Add text watermark with font, size, color, opacity, and rotation

• Add image watermark with scale and opacity

• Apply watermark to all pages or a custom page range

• Choose watermark layer: over or under PDF content

• Preview watermark using a sample PDF preview

• Batch process all uploaded PDFs

• Download files individually or as a ZIP archive

• Automatic file deletion after 1 hour

Watermark Types

Text Watermark

The text watermark option lets you overlay custom text on your PDF pages.

Text watermark controls include:

• Text input – Enter the watermark text you want to display

• Font selection – Choose from Arial, Helvetica, Times New Roman, or Courier

• Font size – Control how large the watermark appears

• Color picker – Select any color for your watermark text

• Opacity slider – Adjust transparency to make the watermark subtle or bold

• Rotation options – Horizontal, diagonal (45° / -45°), or vertical

The text watermark is applied centrally on each selected page using a rotated and transparent overlay.

Image Watermark

The image watermark option allows you to add a logo or image as a watermark.

Image watermark controls include:

• Upload watermark image – Select an image file from your device

• Image preview – View the selected watermark image before processing

• Scale slider – Resize the watermark image relative to the page

• Opacity slider – Control transparency of the watermark image

The image watermark is converted and embedded into the PDF as a watermark layer without affecting the original content.

Page Selection Options

You can control where the watermark appears inside the PDF:

• All Pages – Apply the watermark to every page in the document

• Page Range – Apply the watermark only to specific pages

  • “From” page

  • “To” page

This is useful when you want to watermark only selected sections of a PDF.

Watermark Layer Options

You can choose how the watermark is placed relative to the PDF content:

• Over the PDF content – The watermark appears above text and images

• Under the PDF content – The watermark appears behind the content

This gives you flexibility depending on whether you want the watermark to be clearly visible or subtly embedded.

Preview Feature

Before processing your PDFs, you can use the Preview Watermark feature.

• Displays a sample PDF page on a canvas

• Shows how text or image watermark will look

• Reflects opacity, rotation, font, and scale settings

This preview is a visual demonstration only, helping you confirm settings before applying them to actual PDF files.

How to Use the Watermark PDF Tool

1. Upload one or more PDF files using drag & drop or the upload button

2. Choose the watermark type (Text or Image)

3. Configure watermark options such as size, opacity, font, or scale

4. Select pages (All Pages or Page Range)

5. Choose whether the watermark appears over or under the content

6. Preview the watermark (optional)

7. Click Add Watermark to process the PDFs

8. Download individual watermarked PDFs or download all as a ZIP file

Output & Downloads

• Each processed file is saved with _watermarked.pdf added to the filename

• Download watermarked PDFs individually

• Use Download All to get all processed PDFs in a single ZIP file

Data Privacy & File Deletion

For your privacy and security:

• Uploaded PDFs and watermark images are stored temporarily

• Generated watermarked PDFs are also temporary

• All files are automatically deleted from the server after 1 hour

No files are stored permanently.

The Watermark PDF Tool is a simple, powerful solution to add text or image watermarks to PDF files online. With support for batch processing, page range selection, layer control, and preview functionality, this tool is ideal for protecting documents, adding branding, or marking PDFs for internal or external use—while keeping your data secure and temporary.