Open-source alternatives to Flatnotes

An open source, markdown-based, self-hosted note taking webapp.

StackEdit is a browser-based Markdown editor designed for structured document authoring and collaborative content creation. It functions as an offline-first web application, allowing users to maintain full access to their documents and editing tools without an active internet connection, with changes automatically synchronized once connectivity is restored. The platform distinguishes itself through its support for real-time multi-user collaboration, utilizing operational transformation to merge concurrent edits from multiple participants. It features a modular architecture that supports speci

Blossom is a self-hosted, containerized note-taking application designed for private knowledge management. It functions as a centralized repository for personal documentation, allowing users to maintain full ownership of their data by hosting the platform on their own server infrastructure. The application centers on a markdown-based productivity workflow that synchronizes plain-text files across multiple devices. By utilizing a local-first state management model, it ensures immediate interaction with files while asynchronously reconciling changes through a private server backend. This approa

CKEditor 5 is a modular rich text editor framework and JavaScript UI component used to build customizable visual editors. It serves as a system for generating HTML or Markdown content, providing both full rich-text editor components and restricted inline editor components for web applications. The framework includes a collaborative editing engine for real-time simultaneous editing, change tracking, and threaded commenting. It features an AI text assistant for polishing, rewriting, and generating content, as well as a document export engine that transforms rich text into PDF and Word files. T

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

Note-gen is an artificial intelligence-assisted note-taking application and knowledge management tool designed for local-first data ownership. It functions as a workspace that leverages language models to organize, summarize, and synthesize personal notes into structured documents while maintaining offline accessibility. The platform distinguishes itself through a multimodal workflow orchestrator that chains sequences of tasks to process text, images, and external data. By integrating vision-language models, it extracts information from visual inputs like screenshots and documents, converting

Docmost is an open-source knowledge management system designed as a collaborative documentation platform for teams. It functions as an enterprise wiki that centralizes organizational information into structured, searchable workspaces, enabling users to create, organize, and share content through a hierarchical system of spaces and pages. The platform distinguishes itself by integrating artificial intelligence directly into the documentation lifecycle. It utilizes vector-based semantic search to allow for natural language queries across stored content and provides AI-assisted tools for draftin

This project is a static site generator and documentation publishing tool designed to transform raw markdown files into structured, professional web content. It functions as a technical writing framework that standardizes text-based documentation into pre-rendered HTML pages suitable for public-facing knowledge bases and project guides. The system utilizes file-system-based routing to map directory structures directly to URL paths, ensuring that documentation organization is reflected in the final website navigation. It incorporates component-based layout injection to apply consistent styling

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

This React component is used to render Markdown into a beautiful poster image, with support for copying as an image. Md to Poster/Image/Quote/Card/Instagram/Twitter/Facebook...

CodiMD is a real-time collaborative markdown editor and self-hosted knowledge base. It provides a shared workspace where multiple users can write and format notes using markdown syntax simultaneously. The platform extends basic editing by transforming markdown content into interactive mind maps for data visualization and structured visual slides for presentations. It functions as an OAuth compatible note server, integrating with external identity providers to manage user authentication and access control. The system supports self-hosting and cloud platform deployment, allowing users to maint

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

The largest curated collection of markdown badges for your personal developer branding, profile, and projects.

Dillinger is a browser-based Markdown HTML5 editor designed for real-time text editing and visual rendering. It functions as a cloud-synced writing tool that transforms markup syntax into live HTML previews, utilizing OAuth-integrated authentication to connect users with third-party services. The project distinguishes itself by integrating cloud document synchronization with external storage providers and offering direct publishing capabilities to platforms such as Medium. It also includes a dedicated Markdown-to-PDF converter for generating professional documents and a focus mode to create a

Joplin is an open-source, cross-platform note-taking application designed for secure, private knowledge management. It functions as a local-first productivity platform, maintaining a complete relational database on the user's device to ensure offline availability and high-performance data retrieval. The application prioritizes data sovereignty by implementing an end-to-end encryption layer, which secures all information locally with a master key before any synchronization occurs. The platform distinguishes itself through a delta-based synchronization engine that transmits only specific file c

```bash Usage: options

mdx-editor has been migrated to mdx-notes

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

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

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

Markmap is an interactive diagramming library that transforms hierarchical Markdown documents into navigable mindmaps. It functions as a data visualization component, converting structured text into graphical representations to assist in organizing and visualizing complex information. The library utilizes a parsing engine to interpret indentation levels and list markers, mapping them into nested data objects. These objects are rendered as scalable vector graphics, providing users with dynamic, zoomable, and collapsible diagrams that update reactively as the underlying source text changes. Th

Marktext is a cross-platform desktop application designed for markdown document authoring and structured note-taking. It functions as a WYSIWYG text processor, providing a distraction-free interface that renders formatted content in real-time while hiding the underlying markup syntax. The application utilizes a multi-process architecture that separates system integration from the user interface, ensuring consistent performance across Windows, macOS, and Linux. By employing a custom editor core built on native browser capabilities and a structured syntax tree, it manages complex document eleme

markdown-nice is a web-based markdown editor and renderer designed to transform raw markdown text into formatted HTML. It functions as a CSS stylizer that applies custom themes to content to improve its visual presentation for publishing platforms. The tool focuses on blog post formatting and markdown content styling, allowing users to define the layout and typography of technical articles. It supports the rendering of specialized syntax, including mathematical formulas and footnotes. The editor includes capabilities for persisting user state and style settings in the browser. It utilizes a

This project is an AI-powered document processing engine designed to transform diverse file formats into structured Markdown. By leveraging multimodal language models, it performs complex layout analysis and semantic text extraction, allowing for the conversion of both unstructured files and scanned images into machine-readable content. The toolkit distinguishes itself through a modular, plugin-based architecture that orchestrates multi-stage extraction pipelines. Users can steer the parsing behavior by injecting custom instructions, enabling the system to adapt to domain-specific document st