OpenPDF

What it does

Compression

It can read and write Brotli-compressed PDF streams, while default compression remains FlateDecode for compatibility with older PDF readers.checked 9 Oct 2026

Distribution

The README shows use as a Maven dependency and identifies the latest listed dependency version as 3.0.5.checked 9 Oct 2026

Document features

The library supports text and font handling, text extraction, images, graphics, tables, encryption, and page layout settings.checked 9 Oct 2026

HTML to PDF

The openpdf-html module generates PDFs from HTML/CSS content, including styled reports, invoices, and documents from web templates.checked 9 Oct 2026

Java and Kotlin

OpenPDF is a Java library and provides a Kotlin module for creating PDF files using Kotlin.checked 9 Oct 2026

Java requirements

The README lists Java 21 or later for version 2.1.x and later, Java 17 or later for 2.0.x, Java 11 or later for 1.4.x, and Java 8 or later for 1.3.x.checked 9 Oct 2026

Licensing

The core library is dual-licensed under Mozilla Public License 2.0 or GNU Lesser General Public License 2.1; the HTML and renderer modules are LGPL 2.1 only.checked 9 Oct 2026

Optional dependencies

BouncyCastle is recommended for PDF signing, and Apache FOP is listed as an optional dependency for complex glyph substitution.checked 9 Oct 2026

PDF editing

It can modify existing PDFs by adding or removing pages and modifying text.checked 9 Oct 2026

PDF standard

The project lists PDF 2.0 support (ISO 32000-2).checked 9 Oct 2026

Rendering

The openpdf-renderer module renders PDF pages as images or displays them in Java webapp, Swing, or JavaFX applications.checked 9 Oct 2026

Security limits

OpenPDF does not validate or sandbox input; developers are responsible for ensuring inputs are trusted, sanitized, and safe.checked 9 Oct 2026

Security risks

The security policy calls out risks including local file access, SSRF, path traversal, unsafe Base64 content, and memory exhaustion from large or malformed PDFs.checked 9 Oct 2026

Support and contributions

The project welcomes pull requests and bug reports through its GitHub repository, and links to examples, JavaDoc, and a work-in-progress tutorial.checked 9 Oct 2026

What it does

OpenPDF is an open-source Java library for creating, editing, rendering, and encrypting PDFs, including generating PDFs from HTML.checked 9 Oct 2026