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Top 23 Java PDF Projects
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Stirling-PDF
#1 Locally hosted web application that allows you to perform various operations on PDF files
Project mention: A free, unlimited online PDF converter with Privacy focus | news.ycombinator.com | 2025-01-03Congrats on the launch, it is interesting. Do you have plans for open source the project?
I'm a happy user of Stirling-PDF [1] which provides all my PDF needs. I do host it in my network and not accessible from internet for better privacy.
[1] https://github.com/Stirling-Tools/Stirling-PDF
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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mit-deep-learning-book-pdf
MIT Deep Learning Book in PDF format (complete and parts) by Ian Goodfellow, Yoshua Bengio and Aaron Courville
MIT deep learning PDF
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Project mention: Starting July 1, Academic Publishers Can't Paywall NIH-Funded Research | news.ycombinator.com | 2025-05-01
what do you mean exactly? I was suprised how with grobid many of at least the arXiv papers are easily converted to xml for better processing than PDF.
Most of the papers are constructed from their latex sources so there's an easy way to undo it i guess.
https://github.com/kermitt2/grobid
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OpenPDF
OpenPDF is a free Java library for creating and editing PDF files, with a LGPL and MPL open source license. OpenPDF is based on a fork of iText. We welcome contributions from other developers. Please feel free to submit pull-requests and bugreports to this GitHub repository.
OpenPDF is a fork of iText with Lgpl and Mpl license: https://github.com/LibrePDF/OpenPDF
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Project mention: JavaFX In Action with Pedro Duque Vieira, aka Duke, about Hero, PDFSam, FXThemes, FXComponents,... | dev.to | 2024-06-25
He shares insights into a few applications, like Hero (CAD application to calculate energy efficiency) and PDFSam (powerful and professional PDF editor). PDFSam had 100.000 downloads in April '24!
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Case Study: In a real-world incident, an application experienced a deadlock due to a bug in the Apache PDFBox library. The problem arose when two threads acquired locks in opposite orders, resulting in a deadlock that caused the application to hang. To learn more about this case and how the deadlock was resolved, check out Troubleshooting Deadlock in an Apache Open-Source Library.
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SaaSHub
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itext-java
iText for Java represents the next level of SDKs for developers that want to take advantage of the benefits PDF can bring. Equipped with a better document engine, high and low-level programming capabilities and the ability to create, edit and enhance PDF documents, iText can be a boon to nearly every workflow.
Project mention: How I Made PDF Table Rendering 95% Faster in an Afternoon | news.ycombinator.com | 2025-05-16 -
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Open HTML to PDF
An HTML to PDF library for the JVM. Based on Flying Saucer and Apache PDF-BOX 2. With SVG image support. Now also with accessible PDF support (WCAG, Section 508, PDF/UA)!
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iText
[DEPRECATED] Core Java Library + PDF/A, xtra and XML Worker. Only security fixes will be added — please use iText 7
Project mention: Adobe’s Monopoly on PDFs: The Innovation Bottleneck and the Need for Open-Source Alternatives | dev.to | 2025-03-01Some open-source PDF tools, like iText and Ghostscript, have restrictive licenses, making them impractical for commercial use.
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PdfViewer
Simple Android PDF viewer based on pdf.js and content providers. The app doesn't require any permissions. The PDF stream is fed into the sandboxed WebView without giving it access to content or files. CSP is used to enforce that the JavaScript and styling properties within the WebView are entirely static.
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Project mention: Show HN: Kreuzberg – Modern async Python library for document text extraction | news.ycombinator.com | 2025-02-15
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SaaSHub
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Java PDF discussion
Java PDF related posts
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How I Made PDF Table Rendering 95% Faster in an Afternoon
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Starting July 1, Academic Publishers Can't Paywall NIH-Funded Research
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Adobe’s Monopoly on PDFs: The Innovation Bottleneck and the Need for Open-Source Alternatives
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iText PDF Library turns 25
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A free, unlimited online PDF converter with Privacy focus
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How to Read Thread Dumps – easily & efficiently
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Stirling-PDF: Your All-in-One PDF Solution
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A note from our sponsor - SaaSHub
www.saashub.com | 24 May 2025
Index
What are some of the best open-source PDF projects in Java? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Stirling-PDF | 59,802 |
| 2 | mit-deep-learning-book-pdf | 13,247 |
| 3 | grobid | 4,042 |
| 4 | OpenPDF | 3,864 |
| 5 | pdfsam | 3,790 |
| 6 | Apache PDFBox | 2,825 |
| 7 | flyingsaucer | 2,103 |
| 8 | itext-java | 2,100 |
| 9 | pdf2json | 2,094 |
| 10 | Open HTML to PDF | 2,018 |
| 11 | Tabula | 1,929 |
| 12 | iText | 1,645 |
| 13 | Images-to-PDF | 1,256 |
| 14 | jasperreports | 1,156 |
| 15 | PdfViewer | 724 |
| 16 | document-viewer | 529 |
| 17 | CERMINE | 493 |
| 18 | boxable | 338 |
| 19 | email-to-pdf-converter | 318 |
| 20 | react-native-PDFView | 302 |
| 21 | PDFCreatorAndroid | 278 |
| 22 | Dynamic Jasper | 249 |
| 23 | pdfcompare | 239 |
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