Open-source alternatives to Unioffice

OpenPDF is a Java library and document processor used for creating, editing, rendering, and encrypting PDF documents. It functions as a toolkit for generating new files from scratch, modifying existing document structures, and extracting text content. The project includes a dedicated engine for transforming HTML and CSS content into PDF documents by parsing markup and applying styles. It also provides a rendering engine to convert PDF pages into image formats for thumbnails and previews, alongside a security utility for protecting content via document encryption. The library supports the add

EPPlus is a .NET library designed for programmatically creating, manipulating, and styling Excel files using the Open XML format. It functions as an office file manipulator and spreadsheet processor that allows for the generation and modification of workbooks without requiring the local installation of office productivity software. The library enables the creation of complex workbooks featuring charts, pivot tables, and conditional formatting for automated reporting. It includes an internal calculation engine to execute embedded formulas and spreadsheet logic, and provides security features s

Excelize is a library for reading and writing spreadsheet files in the Office Open XML format. It provides a comprehensive suite of tools for programmatically creating, modifying, and analyzing workbooks, worksheets, and cell data, ensuring compatibility across various office software suites through structured XML serialization. The library distinguishes itself with a built-in formula calculation engine that evaluates complex mathematical and logical expressions directly against workbook data. It also features a memory-mapped streaming architecture, which allows for the efficient processing o

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

Embed PDF Viewer is a browser-based PDF rendering library that uses a WebAssembly port of the PDFium engine to display documents entirely on the client side, with no server-side processing required. It provides a framework-agnostic core engine layer that manages the PDF document lifecycle, memory allocation, and WebAssembly resource cleanup, with dedicated integration hooks for React and Vue 3 that handle initialization, document loading, and reactive state management. The library offers both a pre-built, embeddable viewer that can be inserted into any web page with a single initialization ca

PyPDF2 is a pure Python library for transforming, securing, and extracting data from PDF documents. It provides a comprehensive suite of tools to modify page layouts, manage document security, and retrieve embedded metadata without relying on external C libraries. The toolkit enables document assembly through the merging of multiple files and the splitting of documents into smaller parts. It also supports page-level transformations, including the ability to rotate pages and adjust visible crop areas. The library includes capabilities for security management via password-based encryption and

PyMuPDF is a comprehensive PDF manipulation library and document analysis tool. It serves as a text extraction tool, OCR engine, and image converter, providing a programmatic interface to edit, merge, split, and optimize PDF and Office documents. The project distinguishes itself through high-performance capabilities, including the use of C-bindings for low-level manipulation and parallelized page processing to accelerate workloads. It provides specialized conversion paths, such as transforming PDF content into Markdown for retrieval-augmented generation and large language model pipelines. It

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

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

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

Langroid is a multi-agent orchestration framework and tool integration suite designed for building complex AI applications. It serves as a multi-modal integration layer that connects diverse local and remote language models with an agentic retrieval-augmented generation system. The project distinguishes itself through a collaborative message-exchange paradigm, allowing specialized agents to delegate tasks hierarchically and coordinate via structured communication. It features an advanced state management system for conversational AI, including the ability to rewind and prune conversation hist

pypdf is a Python library for parsing, manipulating, and generating PDF documents. It provides high-level operations for document processing, such as merging multiple files into one or splitting a single document into smaller files. The project includes specialized tools for managing interactive elements, including the creation and modification of annotations, hyperlinks, and form fields. It also supports advanced metadata management, allowing for the extraction and modification of standard document properties and XML-based XMP metadata. Beyond basic structural changes, the library covers pa

DesktopEditors is an office suite application designed for creating and editing text documents, spreadsheets, and presentations across different operating systems. It serves as an OOXML compatible editor, ensuring that files are read and written according to Office Open XML standards for cross-platform document exchange. The suite functions as a collaborative document platform featuring real-time co-authoring, version tracking, and integrated communication tools. It also acts as an AI-powered document assistant and PDF editor, providing capabilities for content generation, automated spreadshe

This project is an Open XML document library and generator used to programmatically create and modify Microsoft Office files. It enables the production of Word, Excel, and PowerPoint documents by manipulating the underlying Open XML structure. The library provides capabilities for Open XML document processing, including the automated modification of existing files and the generation of formatted office reports and spreadsheets for server-side production.

Crawlee-python is a web crawling framework for building scalable scrapers using Python. It serves as a comprehensive tool for web scraping automation, providing a system to extract structured data from websites using both lightweight HTTP requests and headless browser automation. The framework is distinguished by its anti-bot evasion capabilities, which include browser fingerprint impersonation and tiered proxy rotation to bypass detection systems and solve challenges such as Cloudflare. It also incorporates artificial intelligence for autonomous website navigation and schema-based data extra

docx is a JavaScript and TypeScript library for the programmatic generation and manipulation of Word documents. It serves as an OOXML document generator, allowing developers to create formatted office files through code instead of manual editing. The library enables document automation across both Node.js and web browser environments. It supports client-side document export, allowing users to generate and download files directly in the browser without a backend server. Capabilities include the ability to define page layouts, margins, and orientation. Users can programmatically insert documen

python-docx is an OOXML document manipulation library used for creating, reading, and updating Microsoft Word files. It functions as a generator for building formatted documents and a parser for extracting text, metadata, and structural elements from existing files. The project provides a comprehensive style management system for defining and applying character, paragraph, and table styles within OpenXML documents. It allows for the programmatic control of document appearance through an object-oriented approach to the underlying XML schema. Capabilities cover a wide range of document generat

This library provides a framework for constructing professional PDF documents using declarative component syntax. It functions as a document engine that transforms component trees into structured files, allowing developers to define layouts, headers, footers, and margins through standard component structures rather than proprietary markup languages. The tool distinguishes itself by enabling server-side synthesis of dynamic data, which allows for the automated generation of personalized documents from live information sources. It maps web-standard styling and layout properties into the fixed-p

TCPDF is a PHP library for the programmatic generation of PDF documents, allowing developers to create files containing text, graphics, and forms directly from application code. It includes a typography engine that supports Unicode strings, bidirectional scripts, and the embedding of TrueType or OpenType fonts. The library provides specialized tools for producing documents that adhere to PDF/A, PDF/X, and PDF/UA standards for archiving, printing, and accessibility. It features a digital signing system that applies CMS signatures and RFC 3161 timestamps, supporting long-term validation through

PHPWord is a PHP word processing library used for programmatically reading and writing word processing documents. It functions as an OOXML document generator, a word file parser, and a document template engine. The library enables the generation of new documents by applying structured data to existing templates or by creating files from scratch. It provides capabilities for extracting and parsing content, metadata, and structure from existing word processing files. The project covers a broad range of document generation features, including layout formatting, metadata management, and the inse

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

ppt-master is an AI PowerPoint generator and LLM presentation orchestrator that converts documents and text into editable presentation files. It utilizes native shapes and structured layouts to transform content into professional slide decks. The system functions as a template processor capable of injecting generated content into existing PowerPoint files while preserving original brand designs and formatting. It integrates AI imagery services to generate custom visuals and retrieves professional stock photography with attribution management. The project covers automated slide deck creation

pdfminer.six is a programmatic tool for extracting text, layout information, and metadata from PDF documents into machine-readable formats. It functions as a document parser that converts internal PDF objects and structures into accessible data objects for analysis. The project includes utilities for decrypting RC4 and AES encrypted files to enable content extraction. It also provides a layout analyzer to identify fonts, colors, and text locations to determine the organizational structure of pages. The system covers a broad range of extraction capabilities, including the retrieval of embedde

Build PowerPoint presentations with JavaScript. Works with Node, React, web browsers, and more.

QuestPDF is a C# PDF generation library and layout engine used to create structured documents, reports, and invoices. It utilizes a fluent API and a component-based layout approach to convert code into high-fidelity PDF and XPS files. The library distinguishes itself with a dedicated layout debugger that provides real-time previews, hot-reload capabilities, and visual boundary tools to map rendered elements back to source code. It also functions as an accessibility tool, providing semantic tagging and navigational aids to ensure documents comply with international accessibility and archival s

docetl is an AI-powered document ETL tool and map-reduce orchestrator designed to transform large collections of unstructured documents into structured, queryable tables using language models. It provides a declarative pipeline framework for extracting, cleaning, and transforming data from sources such as PDFs and text files into predefined schemas. The project distinguishes itself through a semantic data integration suite that enables joining datasets and resolving duplicate entities based on embedding-based similarity. It includes an interactive prompt playground for developing and optimizi

IronCalc is an XLSX spreadsheet engine and formula evaluator designed to compute numerical expressions and manage workbook structures. It utilizes a logic engine compatible with industry standards to evaluate formulas and manage cell dependencies. The project provides a comprehensive suite of specialized toolkits, including a financial calculation library for bond pricing and net present value, and an engineering math toolkit for complex number arithmetic and Bessel functions. It also features a web-based spreadsheet interface for creating and formatting workbooks. The engine covers a broad