PDF

Add PDF watermark

Place text or a logo watermark on selected pages.

Input

File and output

PDF

Drag a PDF or click to choose it.

PDF. Limits depend on your plan.

File name

Pages Example: 1,3,5-8. Leave empty to use all. Rotation

Password Only used when the PDF is protected or when you want to protect it. Watermark text Watermark image

Position

Size Opacity Color

Result

File ready

PDF

Waiting for file

The result will appear here.

Format: -
Size: -
Pages: -

API

Also available by API

Use the mirror endpoint with multipart or base64 JSON. API balance stays separate from web NOX.

Billing validates balance before processing and only charges after a successful output.

POST /api/v1/tools/pdf-watermark
Authorization: Bearer TU_API_KEY
Content-Type: application/json

{
  "pdf_base64": "data:application/pdf;base64,...",
  "watermark_text": "CONFIDENCIAL",
  "opacity": 25,
  "position": "center"
}