Open-source alternatives to Docx

unioffice is a comprehensive document processing suite that provides a PDF document processor, an Open XML document library, a document security toolkit, and a document content extractor. It is designed to programmatically create, read, and modify Word, Excel, and PowerPoint files, as well as generate and edit PDF documents. The project is distinguished by its native language implementation of the Open XML standard, which removes native binary dependencies to simplify container deployments. It features advanced capabilities for digital document security, including hardware-based PDF signing,

poi-tl is a Java-based template engine for generating DOCX files. It functions as a document generator that populates predefined Word templates with dynamic data and logic to automate the production of reports and contracts. The library enables complex document assembly through recursive template nesting and conditional section rendering. It supports the embedding of images from local paths or URLs and the generation of dynamic tables and lists based on provided data structures. The system handles data-driven reporting by replacing placeholders while preserving original formatting and styles

This project is a Node.js library for bidirectional conversion between XML strings and JavaScript objects. It functions as an XML parser that transforms XML content into structured data and an XML serializer that generates formatted strings from JavaScript data objects. The toolkit includes a data transformer that applies custom processing functions to tags and attributes during the conversion process. It manages XML namespaces and supports the definition of custom root elements to maintain document structure during generation. The system handles XML data parsing, string generation, and name

xmltodict is a Python library that provides bidirectional serialization between XML documents and dictionaries. It functions as a parser that converts marked-up input into key-value pairs and a serialization utility that transforms dictionaries back into structured XML documents. The project includes an incremental stream processor that uses depth-based callbacks to handle large XML files while maintaining constant memory usage. It features a namespace manager for mapping prefixes and declarations, as well as a security sanitizer that blocks external entity expansion and validates element nam

This project is a browser-based PDF editor that allows users to modify documents by inserting and repositioning text, images, and signatures. It functions as a client-side document editor, enabling the rendering, editing, and saving of files entirely within the user's browser environment. By processing all binary data locally, the application ensures that documents are never uploaded to a remote server, maintaining data privacy throughout the editing workflow. The tool utilizes an object-oriented model to manage individual elements, allowing for independent manipulation and transformation of

bpmn-js is a browser-based BPMN 2.0 web modeler and rendering engine used for creating, editing, and visualizing business process models. It functions as an XML process modeler that parses BPMN 2.0 XML data into interactive visual diagrams within a web application. The project distinguishes itself as a business process visualizer with capabilities for process flow simulation, which tracks token movement to mimic real-time execution. It also supports diagram version comparison to identify changes between model iterations and provides a layered overlay interface for binding metadata and custom

jsPDF is a JavaScript PDF generation library and client-side engine that produces documents directly on the user's device. It provides a scriptable interface for creating PDF files within web browsers and other JavaScript runtime environments without requiring a backend server. The library includes a tool for defining document dimensions, orientation, and measurement units to control page layout. It also functions as a Unicode font integrator, allowing for the embedding of custom font files to support diverse languages and special characters. Capability areas cover dynamic document automatio

Docxtemplater is an office document generation engine designed to automate the creation of personalized business documents, presentations, and spreadsheets. By manipulating the underlying XML structure of office files, the framework replaces placeholders within pre-designed templates with dynamic data, enabling the programmatic production of reports, invoices, and complex data-driven documents. The project distinguishes itself through a modular extension architecture that allows developers to integrate custom logic for handling images, charts, and specialized formatting. It supports advanced

Docx-templates is a library designed for the programmatic generation of Word documents by merging dynamic data with predefined template files. It functions as a template engine that processes embedded instructions directly within the document structure to produce customized, data-driven output. The engine distinguishes itself by allowing the execution of arbitrary JavaScript expressions and custom data resolvers during the generation process. This enables complex conditional logic, iterative loops, and the dynamic injection of diverse content types, including images, HTML fragments, and raw X

This is a Go library for reading and writing XLSX files, providing a toolkit for spreadsheet generation and data extraction. It functions as an Office Open XML parser and generator, enabling the creation of workbooks with support for styles, formulas, and metadata. The project features a data mapper that uses Go struct tags and reflection to automatically align spreadsheet rows with structured data. It also includes a validation engine for defining input constraints, such as dropdown lists and error alerts, to control user data entry. The library covers a broad range of capabilities, includi

SpringSide 4 is an enterprise Java reference architecture and utility library built on the Spring Framework. It provides a pragmatic, best-practice application stack for building RESTful web services, web applications, and data access layers, along with a curated collection of high-performance utility classes for common operations like text, date, collection, reflection, concurrency, and I/O handling. The project distinguishes itself by combining a complete reference application scaffold with production-oriented infrastructure. It includes a JPA-based data access layer that automatically tran

NPOI is a pure .NET library for reading and writing Microsoft Office files in both legacy binary (.xls) and modern OpenXML (.xlsx, .docx) formats, operating entirely without requiring Microsoft Office or COM interop. It runs on Windows and Linux under .NET Standard and .NET Framework runtimes, using only managed code to parse and generate Office documents. The library provides comprehensive spreadsheet capabilities, including creating, editing, and reading Excel workbooks in both .xls and .xlsx formats, with support for cell formatting, styles, and formulas. It includes a streaming row-by-row

This project is an open-source office suite that provides a collection of productivity applications for word processing, spreadsheets, presentations, and databases. It implements the Open Document Format standard to ensure interoperability between different office productivity tools. The suite includes a specialized formula equation editor for mathematical formatting, a vector graphics editor for scalable images, and a relational database manager for organizing structured data. The project covers broad functional domains including text document generation, spreadsheet management, presentatio

This project is a web-based Markdown profile builder designed to create professional landing pages for GitHub accounts. It functions as a profile README generator that collects user details and professional statistics to produce formatted Markdown code for showcasing technical skills and achievements. The tool distinguishes itself by integrating live data cards, such as contribution metrics and visitor counters, and providing an RSS feed embedder for automated blog syndication. It also automates the setup process by importing public user information and suggesting relevant skills based on a G

Cherry Markdown is a web-based Markdown editor and parsing engine that converts markup text into sanitized HTML with a real-time synchronized preview pane. It functions as a rich text interface and WYSIWYG tool, providing a system for transforming markup strings into HTML documents or portable formats. The project distinguishes itself through high-performance rendering and a flexible extensibility model. It uses virtual DOM diffing and partial rendering to maintain responsiveness in large documents, and it allows for the creation of custom parsing rules and specialized HTML components via a p

This project is a document editing framework designed for web applications, providing a visual interface for modifying files while maintaining compatibility with standard document formats. It functions as both a browser-based rich text editor and a headless processing engine, allowing for the programmatic parsing, manipulation, and generation of document files in server-side environments. The framework distinguishes itself through its integration with external intelligence models, exposing document manipulation functions as standardized tool calls. This enables automated content generation, d

This project is a web-based document formatting tool designed to generate professional resumes from structured markdown files. It functions as a static site utility that allows users to manage their professional profiles through plain text, ensuring content remains portable and compatible with version control systems. The tool distinguishes itself by performing all document rendering and data processing entirely within the browser. By utilizing a component-driven layout engine, it transforms markdown input into formatted documents in real time without the need for a backend server. Users can

Open-XML-SDK is a library for programmatically creating, modifying, and validating Office documents based on the Open XML standard. It functions as an office file generator and XML document parser, enabling the manipulation of word processing, spreadsheet, and presentation files. The library allows for the generation and updating of document content and structure without requiring the native office applications to be installed. It utilizes strongly typed classes and a schema-validated approach to ensure that created files remain compatible and correctly structured. The project provides capab

vue-office is an office document preview library and web-based document viewer designed to render Word, Excel, PowerPoint, and PDF files directly in a web browser. It provides a collection of reusable components that allow for the display of documents using network URLs, data buffers, or blob data without requiring external plugins. This rendering solution is built as a cross-framework document renderer, offering integration for Vue 2, Vue 3, and React. It enables client-side document display to avoid server-side conversion processes. The library handles document visualization through client

SoftwareCopyright-Skill is a software copyright application generator and documentation tool designed to automate the creation of registration materials and operation manuals. It analyzes local project source code to produce formatted documents and source code extracts required for official software copyright filings. The project synthesizes software operation manuals by translating project business logic and technical features into descriptive functional text. It utilizes template-based generation to inject extracted project data into standardized Word documents, facilitating the creation of

jsPDF is a document creation engine designed to generate professional PDF files through a unified programming interface. It functions as a cross-platform graphics library that enables the programmatic assembly of data into structured layouts, supporting both client-side generation within web browsers and server-side rendering in backend environments. The library utilizes a canvas-based drawing API that translates high-level geometric and text instructions into standardized PDF vector primitives. By employing a cross-platform runtime abstraction, it decouples document generation logic from env

mPDF is a PHP library that transforms UTF-8 encoded HTML and CSS into formatted PDF documents. It serves as a PDF generation engine and document architect capable of converting web pages and HTML forms into professional files. The project is distinguished by its multilingual rendering capabilities, providing comprehensive support for bidirectional text, right-to-left scripts, and CJK languages using Unicode font embedding and OpenType layout processing. It further enables professional print-ready design through advanced color modeling in CMYK, precise page dimensioning, and compliance with PD

CherryTree is a hierarchical note-taking application and rich text document editor designed for organizing information within a nested tree of nodes. It functions as a code-integrated documentation tool and an encrypted knowledge base, utilizing SQLite or XML for local data storage. The project distinguishes itself by integrating developer-centric capabilities, such as syntax highlighting and the ability to execute code blocks directly via an external terminal. It also provides password-protected encryption to secure stored data and prevent unauthorized access to the information tree. The so

ContentTools is a JavaScript framework and suite of tools for building visual WYSIWYG editors. It provides a DOM manipulation library for parsing and transforming HTML strings into structured editable regions, alongside a visual document orchestrator that manages element behaviors and state transitions. The framework includes a specialized browser selection manager to ensure consistent caret positioning and text range highlighting across different web browsers. It also features an HTML content validator used to sanitize output and convert third-party media links into valid embed formats. The

This project is a plugin-based WYSIWYG document layout engine and rich text editor that uses Canvas and SVG for rendering. It functions as a collaborative editor utilizing conflict-free replicated data types to enable real-time synchronization across multiple users. The system serves as an interactive form builder, allowing for the embedding of input controls such as checkboxes and date pickers directly into documents. It is designed for high-fidelity output, ensuring the visual representation during editing matches the final format for PDF and image exports. The editor covers broad capabili

OfficeCLI is a headless office suite and automation tool designed for programmatically reading, editing, and generating Microsoft Office documents. It functions as an OOXML manipulation library and a document templating engine, providing a standalone binary that allows for the management of Word, Excel, and PowerPoint files without requiring a local installation of office software. The project distinguishes itself by exposing document operations as tools for AI agents via a JSON-RPC server and the Model Context Protocol. It enables advanced customization through raw XML manipulation using XPa

Medium.js is a JavaScript rich text editor library and framework for building what-you-see-is-what-you-get editors. It acts as a lightweight wrapper for the browser contenteditable API, transforming standard elements into styled editors that support rich text formatting and semantic HTML output. The library functions as an HTML content sanitizer, stripping unwanted tags and attributes from typed or pasted content to maintain clean markup. It provides a system for implementing custom keyboard interactions and mapping shortcuts to trigger styling changes or element insertion. The framework cov