EML to PDF Converter

A Node.js package that converts EML email files to PDF format with full attachments support.

Features

• Converts EML files to PDF format
• Preserves email metadata (subject, sender, receiver, date)
• Handles HTML and plain text email content
• Merges PDF attachments directly into the output PDF
• Provides both programmatic API and CLI interface
• Generates clean, formatted PDFs with email headers and content

Installation

As a dependency in your project:

npm install eml-to-pdf-converter

As a global CLI tool:

npm install -g eml-to-pdf-converter

Usage

Command Line Interface (CLI)

Convert a single EML file:

eml-to-pdf email.eml
eml-to-pdf email.eml output.pdf

Convert all EML files in a directory:

eml-to-pdf ./emails/
eml-to-pdf ./emails/ ./output/

Show help:

eml-to-pdf --help

Programmatic API

const { convertEmlToPdf, generateOutputFilename } = require('eml-to-pdf-converter');

// Convert a single file
async function convertFile() {
  const outputPath = await generateOutputFilename('email.eml');
  await convertEmlToPdf('email.eml', outputPath);
  console.log('Conversion completed!');
}

convertFile();

Output

The converter generates a single PDF file for each email with:

• Email headers (subject, sender, receiver, date)
• Formatted email content (HTML or plain text)
• Merged PDF attachments (when present)

Files are saved with descriptive names in the format: yyyy_mm_dd_hh_mm_ss_sender_to_receiver.pdf

Dependencies

• mailparser - For parsing EML files
• pdfkit - For PDF generation
• pdf-lib - For merging PDF attachments
• fs-extra - Enhanced file system operations

Notes

• HTML content is processed with basic formatting preservation
• PDF attachments are automatically merged into the main PDF
• Non-PDF attachments are listed in the PDF but not included
• Works with Node.js version 14 and higher