eml to pdf java – Convert Email to PDF with GroupDocs

In many enterprises, archiving email messages as immutable PDFs is essential for compliance, legal discovery, and easy sharing. This tutorial shows you how to convert .eml files to PDF in Java using GroupDocs.Conversion, while giving you full control over which email fields appear in the final document. You’ll see how to hide sensitive headers, configure Maven dependencies, and optimise performance for large batches.

Quick Answers

What library handles email to PDF conversion? GroupDocs.Conversion for Java.
Which Maven artifact do I need? com.groupdocs:groupdocs-conversion.
Can I hide sender/recipient details? Yes—use EmailLoadOptions to control visibility.
Is a license required for production? A valid GroupDocs license is needed for non‑trial use.
What Java version is supported? Java 8 or higher.

What Is Email to PDF Conversion?

Email to PDF conversion transforms .msg, .eml, or other email formats into a static, portable PDF document. This process preserves the original message layout while allowing you to redact sensitive information such as email addresses, headers, or CC/BCC fields, and attachments.

Why Use GroupDocs.Conversion for Java?

GroupDocs.Conversion provides a java pdf conversion library that supports more than 100 input and output formats, including EML, MSG, PDF, DOCX, and HTML. It offers granular EmailLoadOptions so you can decide exactly which parts of an email appear in the PDF, and it integrates seamlessly with Maven for easy dependency management.

Prerequisites

Java Development Kit (JDK) 8+ installed.
Maven for dependency management (see the maven dependency groupdocs conversion section below).
Basic familiarity with Java and Maven projects.

Setting Up GroupDocs.Conversion for Java

Add the GroupDocs repository and the conversion dependency to your pom.xml. This is the groupdocs conversion maven configuration you’ll need.

<repositories>
    <repository>
        <id>repository.groupdocs.com</id>
        <name>GroupDocs Repository</name>
        <url>https://releases.groupdocs.com/conversion/java/</url>
    </repository>
</repositories>

<dependencies>
    <dependency>
        <groupId>com.groupdocs</groupId>
        <artifactId>groupdocs-conversion</artifactId>
        <version>25.2</version>
    </dependency>
</dependencies>

License Acquisition

Free Trial – Explore all features without cost.
Temporary License – Request a short‑term key for extended evaluation.
Purchase – Obtain a full license for production deployments.

How to Convert eml to pdf java with Advanced Options?

EmailLoadOptions defines which parts of an email are rendered during conversion. Load your .eml file, configure which fields to display, and invoke the converter—all in a few concise steps. This answer gives you the complete workflow in under 70 words. You will create EmailLoadOptions, set PDF conversion settings, and call the convert method, handling any exceptions that may arise.

Step 1: Configure Email Load Options

EmailLoadOptions lets you toggle visibility of individual email sections such as sender, recipients, and headers.

import com.groupdocs.conversion.options.load.EmailLoadOptions;

EmailLoadOptions loadOptions = new EmailLoadOptions();
loadOptions.setDisplayHeader(false);
loadOptions.setDisplayFromEmailAddress(false);
loadOptions.setDisplayToEmailAddress(false);
loadOptions.setDisplayEmailAddress(false);
loadOptions.setDisplayCcEmailAddress(false);
loadOptions.setDisplayBccEmailAddress(false);
loadOptions.setConvertOwned(false); // Prevent conversion of fields that are owned by the document

Step 2: Initialize the Converter

Converter is the engine that performs the conversion using the provided load and convert options.

import com.groupdocs.conversion.Converter;
import com.groupdocs.conversion.options.convert.PdfConvertOptions;

Converter converter = new Converter("YOUR_DOCUMENT_DIRECTORY/SAMPLE_MSG", () -> loadOptions);

Step 3: Set PDF Conversion Options

PdfConvertOptions configures PDF output settings such as page size and compression.

PdfConvertOptions options = new PdfConvertOptions();

Step 4: Perform the Conversion

Invoke convert with the destination file path and the PDF options you defined. The method returns a boolean indicating success.

converter.convert("YOUR_OUTPUT_DIRECTORY/ConvertEmailWithAlteringFieldsVisibility.pdf", options);

How to Convert msg to pdf java (Re‑using the Same Options)

EmailLoadOptions defines which parts of an email are rendered during conversion. If you need to handle Outlook .msg files, the same EmailLoadOptions and Converter workflow applies. Just replace the source file path with a .msg file. You can also adjust the load options to hide or show specific headers, and reuse the same PdfConvertOptions to maintain consistent output quality across formats.

Step 1: Configure Email Load Options (Re‑used)

import com.groupdocs.conversion.options.load.EmailLoadOptions;

EmailLoadOptions emailLoadOptions = new EmailLoadOptions();
emailLoadOptions.setDisplayHeader(false);
emailLoadOptions.setDisplayFromEmailAddress(false);
emailLoadOptions.setDisplayToEmailAddress(false);
emailLoadOptions.setDisplayEmailAddress(false);
emailLoadOptions.setDisplayCcEmailAddress(false);
emailLoadOptions.setDisplayBccEmailAddress(false);
emailLoadOptions.setConvertOwned(false); // Do not convert owned fields

Step 2: Initialize Converter with Email Load Options

Converter emailConverter = new Converter("EMAIL_FILE_PATH", () -> emailLoadOptions);

Practical Applications

Here are three real‑world scenarios where email to pdf conversion shines:

Legal Documentation – Redact personal data before sharing email evidence with clients.
Corporate Archiving – Store internal communications in a standardized, read‑only format for long‑term retention.
Personal Organization – Keep a clean PDF archive of important messages without exposing unnecessary addresses.

Performance Considerations

File‑size optimisation – Process smaller batches or enable PDF compression (PdfConvertOptions.setCompressionLevel(CompressionLevel.Maximum)) to keep output under 2 MB for typical 10‑page emails.
Memory management – Use Java’s streaming APIs and increase JVM heap (-Xmx2g) when converting multi‑megabyte .msg files.
Version upgrades – The latest GroupDocs.Conversion release improves conversion speed by up to 30 % compared with version 24.x.

Common Issues & Solutions

Issue	Cause	Solution
OutOfMemoryError on large `.msg` files	Whole file loaded into memory	Stream the email content or increase JVM heap size (`-Xmx2g`).
Missing email body in PDF	`displayHeader` set to `true` while body hidden	Ensure `setDisplayHeader(false)` only hides headers; body remains visible.
License not recognized	Using trial key in production	Replace with a valid production license file or string.

Frequently Asked Questions

Q: What is GroupDocs.Conversion for Java?
A: It’s a Java library that enables conversion between over 100 file formats, including email to PDF conversion, with high fidelity and no external dependencies.

Q: How do I ensure email privacy during conversion?
A: Use EmailLoadOptions to turn off fields such as sender, recipient, and CC/BCC addresses before conversion.

Q: Can I convert other document types besides email?
A: Yes, the library also supports Word, Excel, PowerPoint, images, and many more formats.

Q: What are the memory requirements for converting large emails?
A: Allocate at least 2 GB of heap (-Xmx2g) and consider processing files in batches to stay within memory limits.

Q: Where can I find more information on GroupDocs.Conversion?
A: Visit the official documentation and API reference. See the GroupDocs.Conversion for Java Docs and the GroupDocs.Conversion API Reference.

Last Updated: 2026-05-21
Tested With: GroupDocs.Conversion 25.2
Author: GroupDocs