Open-source alternatives to Stackedit

BlockNote is a block-based rich text editor and a real-time collaborative workspace. It uses a JSON-based data model to organize content into draggable, nestable blocks rather than a single flat document. The system functions as a high-level interface built on ProseMirror that abstracts document state into discrete, manipulatable content blocks. The project serves as a framework for integrating large language models into document editors, enabling context-aware text generation and AI-driven workflows. It also acts as a document export engine capable of converting structured block data into fo

Etherpad-lite is a web-based platform designed for real-time collaborative text editing. It enables multiple users to view and modify the same document simultaneously, utilizing an operational transformation engine to synchronize content across all connected client sessions. The platform distinguishes itself through a modular, plugin-based architecture that allows for the integration of third-party extensions to introduce custom functionality. It provides a comprehensive programmatic interface for document management, allowing users to automate the creation, update, and retrieval of text docu

Univer is a modular, web-based framework for embedding high-performance office editing suites, including spreadsheets, documents, and presentations, directly into web applications. It utilizes a canvas-based rendering engine to manage complex layouts and large datasets, ensuring consistent performance during user interaction. The system is built on an isomorphic data model that allows the same document logic to function in both browser-based interfaces and headless server-side environments. The platform distinguishes itself through a command-based state mutation system and a dependency-graph

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 web-based collaborative editor and scientific document management system designed for LaTeX. It provides a centralized environment for writing, editing, and compiling academic manuscripts, enabling multiple users to work on the same project simultaneously through real-time synchronization. The platform distinguishes itself by treating documents as version-controlled repositories, allowing for granular history tracking and bidirectional synchronization with external version control systems. It features a secure, containerized compilation pipeline that isolates build processes

MarkEdit is a high-performance Markdown text editor and document navigator. It provides a scriptable editing environment that supports side-by-side HTML rendering for real-time formatting previews. The editor is distinguished by a multi-caret engine that enables rectangular block selections and simultaneous modification of multiple text ranges. It allows for extensive interface and functional customization through external CSS stylesheets and the integration of system-level scripts to automate repetitive tasks. The application includes tools for managing large documents, such as content bloc

Quill is a modular, web-based rich text editor designed for structured content authoring. It provides a comprehensive toolkit for building tailored editing experiences, allowing developers to manage document state, handle user input, and synchronize content through a predictable, serializable data model. The editor distinguishes itself through a custom document abstraction that maps the browser DOM to a structured tree of nodes, ensuring consistent behavior across different environments. It utilizes an operational change tracking system that represents all document modifications as a sequence

Notable is a local-first markdown note-taking application designed for managing personal knowledge bases. It functions as a document management system that stores all notes and attachments as plain text files directly on the local disk, ensuring data ownership and compatibility with external file-system tools. The application prioritizes a keyboard-centric workflow, utilizing a command-palette-driven interface to facilitate rapid navigation and content manipulation. It provides a distraction-free writing environment that allows users to hide interface elements, helping to maintain focus while

Tiptap is a headless, modular framework designed for building custom rich-text editors. It provides a developer-focused abstraction layer over a structured document model, allowing for full control over the underlying schema through a plugin-based architecture. By separating document state management from the user interface, it enables the creation of tailored editing experiences that remain framework-agnostic. The project distinguishes itself through a robust collaborative engine that supports real-time multi-user editing, conflict resolution, and presence tracking. It integrates artificial

Ghostwriter is a distraction-free markdown text editor and document processor. It provides a focused writing environment for composing documents using markdown syntax, separating the drafting process from final formatting. The application features a minimalist interface designed to minimize visual clutter, including the ability to disable deletion keys to enforce a forward-only drafting flow. It includes a live statistics dashboard for tracking word counts and session metrics, as well as visual highlighting that fades non-active text to focus attention on the current line, sentence, or paragr

Markwhen is a markdown data visualizer and timeline generator that transforms structured text into interactive chronological views. It functions as a text-based timeline editor, synchronizing plain text editing with real-time visual previews of event sequences. The system renders chronological data in multiple formats, including cascading timelines, Gantt charts, calendars, and resumes. It supports self-hosting via Docker containerization, allowing users to run the renderer on private infrastructure. The project includes a client library for custom view development and offers integration wit

Payload is a headless content management system and application framework that uses a code-first approach to define data schemas and administrative interfaces. By utilizing a centralized, type-safe configuration object, it automatically generates database schemas, API endpoints, and a fully customizable admin panel. The system is built on a database-agnostic architecture, allowing it to interface with various storage engines while providing a unified, type-safe API for server-side operations, REST, and GraphQL. What distinguishes Payload is its deep extensibility and developer-centric design.

This project is a web-based rich text editor designed for markdown content authoring. It provides a dual-mode interface that synchronizes raw markdown syntax with a visual WYSIWYG editing experience, allowing users to toggle between modes while maintaining a consistent document state. The editor distinguishes itself through a modular architecture that supports custom content blocks and plugin extensions. This system enables the integration of specialized features such as code syntax highlighting, chart rendering, diagram generation, and complex table formatting. It also includes a live previe

mavonEditor is a markdown editor component for Vue applications that functions as a markdown-to-HTML converter and a visual text editor. It provides a synchronized preview and a writing interface that renders markdown content in real-time. The project includes a security layer that cleans HTML tags and attributes through sanitization to prevent the execution of malicious scripts in the browser. The editor supports technical documentation authoring with capabilities for mathematical notation, footnotes, automated tables of contents, and code syntax highlighting. It also includes a system for

Leanote is a collaborative Markdown editor, hierarchical note manager, and self-hosted blogging platform. It functions as a knowledge base that uses a document store to organize structured notebooks and rich-text documents. The system enables real-time co-authoring, allowing multiple users to simultaneously edit documents and brainstorm ideas. It also includes a publishing engine that transforms private notes into public-facing blogs using customizable themes and multi-contributor management. The platform provides tools for knowledge management through notebooks and tags, supporting both ric

Milkdown is a plugin-driven framework for building rich text editors that render and edit Markdown content in real time. It serves as an extensible rich text framework and a visual editor for Markdown documents, eliminating the need for a separate preview pane. The system is designed as a modular toolkit for creating customizable text editing experiences. It allows for the development of specialized editors with unique formatting rules and behaviors through a plugin-based extension model. The framework covers capabilities for markdown content management and the creation of visual editing int

This project is a browser-based Markdown composer and an embeddable JavaScript component designed to replace standard HTML text areas with a formatted editing interface. It serves as a tool for Markdown content authoring, providing a visual environment for creating and formatting text. The editor features a formatting toolbar and keyboard shortcuts for real-time Markdown parsing, along with integrated spell checking to identify errors as the user types. It includes a system for automatic draft management that saves content to local storage at configurable intervals to prevent data loss. The

TakeNote is a containerized web application designed as a markdown notes manager for developers. It provides a structured environment for storing technical documentation and plain text snippets using categories and favorites. The application functions as a specialized markdown text editor featuring multi-cursor support and keyboard shortcuts for high-efficiency text manipulation. It includes a live preview mode that renders markdown with syntax highlighting for code blocks. The system covers note organization and management through category-based filtering, bulk collection actions, and a dra

Macdown is a markdown text editor and HTML renderer designed for structured document composition. It provides a workspace for writing in lightweight markup syntax while simultaneously generating a live HTML preview of the rendered output. The editor distinguishes itself through a programmable interface, offering a command line utility to open files or pipe text directly into the application. It further supports extensibility via a plugin system that allows for the addition of custom features and functional modules at runtime. The application handles technical documentation requirements inclu

yn is a markdown text editor and knowledge management tool designed as an interactive document canvas. It functions as a networked note-taking system for organizing information via wiki-links, hashtags, and local file repositories, while integrating an AI writing assistant for automated text generation and completion. The project is distinguished by its multi-engine diagramming capabilities, which render text-based syntax into visuals using Mermaid, PlantUML, and ECharts. It employs an extensible plugin framework that allows for the addition of custom UI elements and features through JavaScri

This project is a browser-based JavaScript library that transforms standard web elements into inline, WYSIWYG rich text editing areas. It functions as a programmatic wrapper around the native browser content-editable attribute, providing a structured interface for managing text input, media embedding, and document formatting directly within existing page layouts. The editor is distinguished by its contextual floating toolbar, which dynamically appears based on user text selection to provide relevant formatting options. It utilizes a plugin-based architecture that allows developers to inject c

Editor.js is a block-style rich text editor that organizes document content into an ordered array of independent, modular data objects. By replacing monolithic HTML strings with a structured, machine-readable JSON format, it decouples the content creation process from the final presentation layer. The editor functions as a browser-based orchestration layer that manages user input, focus, and state synchronization across individual blocks. Its architecture is built on a plugin-driven system where external modules register themselves to handle specific content types, providing custom rendering

Markdoc is a documentation content framework that extends standard Markdown with custom tags, typed schemas, and reusable components, parsing content into an abstract syntax tree and rendering it as React elements or HTML. It provides a structured authoring system where documents are processed through an AST-based pipeline, enabling validation, transformation, and flexible output generation. The framework distinguishes itself through a schema-driven validation pipeline that checks document structure and attribute values against defined rules, and a pluggable renderer architecture that accepts

Slate is a customizable rich text editor framework that treats documents as a recursive tree of nodes. It functions as a schema-based, state-driven system designed to enforce structural constraints and manage nested components within a structured document model. The framework utilizes a plugin-based architecture to extend editor functionality, allowing for the injection of custom logic into the rendering and transformation pipeline. It supports real-time collaborative editing by synchronizing document operations across multiple users. The system covers a broad range of capabilities, includin

BigBlueButton is an open-source virtual classroom software and meeting server designed for hosting real-time online teaching sessions. It functions as a WebRTC video conferencing platform and collaboration suite, providing a self-hosted environment for virtual classroom management and online course administration. The system distinguishes itself through specialized educational tools, including an interactive quiz engine, breakout room coordination, and live polling. It provides a comprehensive suite of collaborative assets such as a shared infinite whiteboard, real-time co-authored notes, and

This project is a community-curated directory of open-source software designed for deployment in private server environments and home labs. It serves as a comprehensive resource for discovering independent, self-hosted alternatives to mainstream cloud services, enabling users to maintain full data ownership and control over their digital infrastructure. The directory is structured through a hierarchical taxonomy that organizes a vast collection of applications into logical categories, ranging from media management and data analytics to private communication and team productivity tools. It dis

Seafile is a self-hosted file synchronization and sharing platform that provides a central server for maintaining file consistency across multiple devices. It functions as a cloud storage management system and a collaborative document suite, integrating tools for real-time teamwork and shared file management. The platform distinguishes itself through a metadata-driven file organizer that uses extensible properties and hierarchical tags instead of traditional folder structures. It includes client-side encrypted storage to protect private data using user-defined passwords before files leave the