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Add Watermark

Add text or image watermarks to PDF files. Protect and brand your documents.

Upload PDF File

Drag and drop a PDF file.

Developer API

Available via API

Automate this PDF workflow with the PDF Tools API. Each successful request costs 1 Credit, and failed processing attempts are refunded automatically.

/api/external/pdf-tools/add-watermark1 Credit per successful requestOutput: result.pdf
API DocsGet API Key
curl -X POST https://itextmaster.com/api/external/pdf-tools/add-watermark \
  -H 'x-api-key: YOUR_API_KEY' \
  -F 'file=@input.pdf;type=application/pdf' \
  -F 'options={"text":"Confidential","opacity":0.3}' \
  --output result.pdf

About This Tool

Add Watermark allows you to place text or image watermarks on your PDF documents. Watermarks can indicate document status (Draft, Confidential), add branding, or deter unauthorized copying.

Customize the watermark's position, size, opacity, rotation, and color. Apply to all pages or select specific pages. The tool supports both text watermarks and image watermarks.

All processing happens locally in your browser, ensuring your documents remain private.

How to Use

  1. Upload Your PDF

    Drag and drop your PDF file or click to select the document.

  2. Create Watermark

    Enter text or upload an image for your watermark. Adjust position, size, opacity, and rotation.

  3. Apply and Download

    Click Apply to add the watermark and download your updated PDF.

Use Cases

Document Protection

Add "Confidential" or "Draft" watermarks to indicate document status.

Brand Documents

Add company logos or names to official documents.

Copyright Notice

Add copyright information to protect intellectual property.

Practical guide

Why choose local processing?

  • Business PDFs can contain contracts, invoices, identity details, or internal business information, so keeping processing in the browser reduces exposure.
  • The website tool is free to use with no usage limits and does not require sign-in.
  • Local processing also keeps iteration fast: adjust options, preview the result, and export a branded PDF without waiting for an upload queue.

Best files for this tool

  • Best for PDF files that open correctly in a modern browser and are not intentionally damaged or restricted.
  • Works well for everyday business, school, legal, finance, and personal documents where you need a branded PDF.
  • For very large files, close unused tabs and process one batch at a time so the browser has enough memory.

Common limitations

  • Encrypted or permission-restricted PDFs may need to be unlocked before processing.
  • Scanned pages, unusual fonts, complex layers, and damaged files can reduce accuracy or processing speed.
  • Browser memory and device performance matter more for local tools than for upload-based services.

Local processing vs upload-based tools

  • Local tools keep routine website processing on your device, while upload-based tools send files to a remote server.
  • Upload-based services can move heavy work off your computer, but they add transfer time and require trusting a server with your files.
  • Use the API when you intentionally need server-side automation; use the website when you want private manual processing.

What to do if processing fails

  • Try a smaller file, a shorter page range, or one file at a time if the browser runs out of memory.
  • If a PDF is encrypted, damaged, or restricted, unlock or repair it first and then retry the workflow.
  • If the output looks wrong, check whether the source file uses scans, complex transparency, form fields, or unsupported embedded objects.

API automation

Automate apply text or image marks with the PDF Tools API. Each successful request uses 1 Credit, and every signed-in user receives 100 free API Credits each month.

View API automation docsCreate API Key

Frequently Asked Questions

Can I use an image as a watermark?

Yes, you can upload PNG, JPG, or SVG images to use as watermarks.

Can I make the watermark semi-transparent?

Yes, you can adjust the opacity from fully transparent to fully opaque.

Can I apply different watermarks to different pages?

The tool applies the same watermark to selected pages. For different watermarks, process the document multiple times.

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