GroupDocs.Watermark for Node.js via Java offers read & write watermark support for the documents of 40+ file formats. Supports watermark search, customization & extraction as well.

Node.js Watermark API Features

• Add text and image watermark to supported document formats.
• Search and remove text and image watermarks.
• Search watermarks in particular objects.
• Apply a watermark to images inside a document.
• Work with existing watermark objects.
• Extract information of watermark objects in a document.
• Perform PDF document rasterization.
• Fetch document basic information.
• Search watermarks by text formatting (font, color, etc.).
• Set background image for charts in Excel and PowerPoint documents.
• Work with PDF and email attachments.

Supported File Formats

Microsoft Word: DOC, DOT, DOCX, DOCM, DOTX, DOTM, RTF Microsoft Excel: XLSX, XLSM, XLTM, XLT, XLTX, XLS Microsoft PowerPoint: PPTX, PPTM, PPSX, PPSM, POTX, POTM, PPT, PPS Microsoft Visio: VSD, VDX, VSDX, VSTX, VSS, VSSX, VSDM, VSSM, VSTM, VTX, VSX OpenOffice: ODT Email: EML, EMLX, OFT, MSG Fixed Layout: PDF Image: BMP, GIF, JPG/JPEG/JPE, JP2, PNG, TIFF, WEBP

Supported Watermark Types

• Text stamps
• Text labels
• Text as an image watermark
• Image watermark

Getting Started with GroupDocs.Watermark for Node.js via Java

Installation

From the command line:

npm i @groupdocs/groupdocs.watermark

Adding text watermak to the PDF document using Node.js

  const loadOptions = new groupdocsWatermark.PdfLoadOptions();
  const watermarker = new groupdocsWatermark.Watermarker(pdfDocumentPath, loadOptions);

  const watermark = new groupdocsWatermark.TextWatermark('Test watermark', new groupdocsWatermark.Font('Arial', 36, groupdocsWatermark.FontStyle.Bold | groupdocsWatermark.FontStyle.Italic));
  const options = new groupdocsWatermark.PdfXObjectWatermarkOptions();
  options.setPageIndex(0);

  watermarker.add(watermark, options);

  watermarker.save(outputFilePath);

Search for watermarks in the document using Node.js

// Create watermarker
  const watermarker = new groupdocsWatermark.Watermarker(documentPath);

  // Search by exact string
  const textSearchCriteria = new groupdocsWatermark.TextSearchCriteria("2017");

  // Find all possible watermarks containing some specific text
  const possibleWatermarks = watermarker.search(textSearchCriteria);

  // Output the results
  console.log(`Found ${possibleWatermarks.getCount()} possible watermark(s)`);

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