Browse free open source Java Data Formats Software and projects below. Use the toggles on the left to filter open source Java Data Formats Software by OS, license, language, programming language, and project status.
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CoolReader is fast and small cross-platform XML/CSS based eBook reader for desktops and handheld devices. Supported formats: FB2, TXT, RTF, DOC, TCR, HTML, EPUB, CHM, PDB, MOBI. Platforms: Win32, Linux, Android. Ported on some eInk based devices.
Multi platform library to read and write schedule data
MPXJ is an open source file handling library for Java, .Net and Ruby to read and write Microsoft Project MPX and MSPDI XML files, Planner files, Primavera XER files and databases, Asta Powerproject files and databases, Asta Easyplan files, Phoenix Project Manager files, FastTrack FTS files, GanttProject GAN files, TurboProject PEP files, ConceptDraw PROJECT CDPX, CPDZ and CPDTZ files, Synchro Scheduler SP files and MPP, MPT, and MPD files for Project 98, 2000, 2002, 2003, 2007, 2010, 2013, 2016 and 2019.
eXist-db is a feature rich Open Source native XML database
eXist-db is a native XML database featuring efficient, index-based XQuery processing, extensions for keyword search, XUpdate support, XSLT support, XForms support, REST and tight integration with existing XML development tools. Moved to Github - https://www.github.com/exist-db/exist
A set of tools for working with high-throughput sequencing data
A set of tools (in Java) for working with next generation sequencing data in the SAM/BAM format. Note that development has moved to GitHub at https://github.com/broadinstitute/picard and support is available on the GATK forum at http://gatkforums.broadinstitute.org/categories/ask-the-team
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Grassroots DiCoM is a C++ library for DICOM medical files. It is accessible from Python, C#, Java and PHP. It supports RAW, JPEG, JPEG 2000, JPEG-LS, RLE and deflated transfer syntax.
It comes with a super fast scanner implementation to quickly scan hundreds of DICOM files.
It supports SCU network operations (C-ECHO, C-FIND, C-STORE, C-MOVE). PS 3.3 & 3.6 are distributed as XML files.
It also provides PS 3.15 certificates and password based mecanism to anonymize and de-identify DICOM datasets.
This project is no longer actively maintained. It is succeeded by the Eclipse RDF4J project, which can be found at GitHub and at http://www.rdf4j.org/.
Sesame is a de-facto standard framework for processing RDF data. This includes parsing, scalable storage, reasoning and full SPARQL 1.1 query/update support. Sesame offers a fully modular toolkit and an easy-to-use Java API that can be connected to all leading RDF storage solutions.
HDFView is a free, open-source graphical application developed by The HDF Group for exploring and editing Hierarchical Data Format files. It supports HDF4 and HDF5 datasets commonly used in scientific research, engineering, and data analysis. Users can browse files through a hierarchical tree displaying groups, datasets, and related objects. The software provides spreadsheet-style views for examining multidimensional numerical data. It also allows users to inspect metadata, attributes, and data types associated with stored information. Selected datasets can be displayed through image and graphical visualization tools. HDFView supports modifying supported data objects and managing file structures. Built with Java, it provides a cross-platform environment for working with complex scientific datasets.
A file format for exchanging computational models in systems biology
The Systems Biology Markup Language (SBML) is an XML-based description language for representing computational models in systems biology. Visit the project web site to learn more.
MsgViewer is email-viewer utility for .msg e-mail messages, implemented in pure Java. MsgViewer works on Windows/Linux/Mac Platforms. Also provides a java api to read mail messges (msg files) programmatically.
NekoHTML is a simple HTML scanner and tag balancer that enables application programmers to parse HTML documents and access the information using standard XML interfaces.
A Swiss Army Knife GUI application for PDF documents: combine, split, rotate, reorder (n-up, booklet), watermark, edit bookmarks/fileinfo/pagetransition, compress, encrypt, decrypt, sign, repair, edit attachments and more.
ProM is the comprehensive, extensible framework for process mining. Process Mining deals with the a-posteriori analysis of (business) processes using enactment logs.
This project is the development of an open source fully emulated Darkfall Online Server and reverse engineering the proprietary game engine that DFO uses, the SF3D engine as well as its source code.
Open and edit the archive files used in over 5700 games.
Reads and writes archives used in many popular games. Great for mod development and game translations. Supports over 5700 games, with more games added through small plugins. Also shows file previews and converts them to different formats.
This project contains core low-level incremental ("streaming") parser and generator abstractions used by Jackson Data Processor. It also includes the default implementation of handler types (parser, generator) that handle JSON format. The core abstractions are not JSON specific, although naming does contain 'JSON' in many places, due to historical reasons. Only packages that specifically contain the word 'json' are JSON-specific. This package is the base on which Jackson's data-binding package builds on. It is licensed under Apache License 2.0. Alternate data format implementations (like Smile (binary JSON), XML, CSV, Protobuf, and CBOR) also build on this base package, implementing the core interfaces, and making it possible to use standard data-binding packages regardless of underlying data format.
Java based XSLT Processor extension for syntax highlighting
Please note that project moved to GitHub: https://github.com/xmlark/xslthl
This is an implementation of syntax highlighting as an extension module for XSLT processors (Xalan, Saxon), so if you have e.g. article about programming written in DocBook, code examples can be automatically syntax highlighted during the XSLT processing phase.
The DITA Open Toolkit is an implementation of the OASIS DITA XML Specification. The Toolkit transforms DITA content into many deliverable formats. See https://www.dita-ot.org/ for documentation and links to downloads.
The source code and issue trackers have been moved to https://github.com/dita-ot/dita-ot
Provides log back encoders, layouts, and appenders to log in JSON and other formats supported by Jackson. Supports both regular LoggingEvents (logged through a Logger) and AccessEvents (logged via logback-access). Originally written to support output in Logstash's JSON format, but has evolved into a highly configurable, general-purpose, structured logging mechanism for JSON and other Jackson data forms. The structure of the output, and the data it contains, is fully configurable. The general composite JSON encoders/layouts can be used to output any JSON format/data by configuring them with various JSON providers. The Logstash encoders/layouts are really just extensions of the general composite JSON encoders/layouts with a pre-defined set of providers. The logstash encoders/layouts are easier to configure if you want to use the standard logstash version 1 output format.
MathOCR is a printed scientific document recognition system. MathOCR is still in the pre-alpha stage, recognition result may not be good enough for practical purposes. MathOCR is a printed scientific document recognition system written in pure Java. MathOCR has the functionality of image preprocessing, layout analysis and character recognition, especially the ability to recognize mathematical expression. MathOCR can work do not depends on other OCR software.
PDF Parser for AI-ready data. Automate PDF accessibility
OpenDataLoader PDF is an open-source document processing system designed to convert complex PDF files into structured, AI-ready formats such as Markdown, JSON, and HTML while preserving layout, hierarchy, and semantic meaning. It focuses on enabling downstream use cases like retrieval-augmented generation (RAG), knowledge extraction, and document intelligence pipelines by maintaining accurate reading order and spatial metadata through bounding boxes. The tool combines deterministic parsing methods with an optional hybrid AI-powered mode that improves extraction quality for difficult layouts such as multi-column documents, scanned files, and scientific papers. It includes built-in OCR capabilities supporting dozens of languages, making it suitable for digitizing low-quality or image-based PDFs. A key differentiator is its emphasis on accessibility automation, as it can generate tagged PDFs aligned with accessibility standards, significantly reducing manual remediation effort.
Reformats Java source code to comply with Google Java Style
google-java-format is a program that reformats Java source code to comply with Google Java Style. The formatter can act on whole files, on limited lines, on specific offsets, passing through to standard-out (default) or altered in-place. There is no configurability as to the formatter's algorithm for formatting. This is a deliberate design decision to unify our code formatting on a single format. The formatter can be used in software that generates java to output more legible java code. Just include the library in your maven/gradle/etc. configuration. A google-java-format IntelliJ plugin is available from the plugin repository. To install it, go to your IDE's settings and select the Plugins category. Click the Marketplace tab, search for the google-java-format plugin, and click the Install button.
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