A watermark is text or an image that appears either in front of or behind existing document content, like a stamp. For example, you could apply a "Confidential" watermark to pages with sensitive information. You can add multiple watermarks to one or more PDFs, but you must add each watermark separately. You can specify the page or range of pages on which each watermark appears.

Unlike a stamp, a watermark is integrated into PDF pages as a fixed element. A stamp is a type of PDF comment, which others reading the PDF can open to display a text annotation, move, change, or delete.

You can add PDF watermark by our online program, PDFConvert desktop software or command line program.

PDF Watermark Form
Local PDF File:
Stamp PDF File:
Stamp on:	foreground   background

Use this form to add a stamp or watermark on PDF file online.

1. Click the "Choose File" button (different web browsers may have different button names such as "browse..."), a browse window will open, select a local Adobe PDF file and click the "Open" button.
2. Choose stamp on foreground or background. Click the "Add Watermark Now!" button to convert. Wait a few seconds for the task to finish.
3. You can download or view the PDF file on your web browser when task is complete.

After installing PDFConvert software, click Start - Programs - PDFConvert - PDFConvert to run.

Click Toolbar Settings, Click the "PDF Watermarks" button on the left.

Choose Image watermarks option if you want to add image watermark on PDF file. Click browse button to select a local image file. The image file can be any popular image formats such as BMP, PNG, JPG, GIF or TIF etc.

Choose Text watermarks option if you want to add a text watermark on PDF file. Click Font... button to change font name, size, type, and color. Enter text content in the input box. Leaving this page will save settings.

PDFConvert will apply the watermark to the PDF file when a PDF file is created from image files or documents.

Download pdfconvert.exe, and run pdfconvert.exe command line program to Add PDF watermark on background without windows showed.

/?

Shows all command line parameters of pdfconvert.exe.

/i

input files

For example: pdfconvert.exe /i "c:\pdf\1.pdf"

/o

output folder

For example: pdfconvert.exe /o "c:\pdf2"

/wt

Set the PDF file text watermarks information

/wfn

Set the PDF file text watermarks font name

/wfs

Set the PDF file text watermarks font size

/wft

Set the PDF file text watermarks font style (B: Bold, I: Italic, U: Underline, S: StrikeOut)

/wi

Set the PDF file image watermarks picture file path

/wiw

Set the PDF file image watermarks picture width

/wih

Set the PDF file image watermarks picture height

/wo

Set the PDF file watermarks opacity (0 - 1)

/wr

Set the PDF file watermarks rotation angle (-90 - 90)

/wul

Set the PDF file watermarks left offset value, the unit is inches

/wut

Set the PDF file watermarks top offset value, the unit is inches

For example: This command will add picutre "c:\image\1.jpg" to local PDF file "c:\pdf\1.pdf" as image watermark. The other watermark parameters remain default values.
pdfconvert.exe /i "c:\pdf\1.pdf" /o "c:\pdf2" /wi "c:\image\1.jpg"