Open Source JavaScript Markdown Editors
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JavaScript Markdown Editors
View 84 business solutionsBrowse free open source JavaScript Markdown Editors and projects below. Use the toggles on the left to filter open source JavaScript Markdown Editors by OS, license, language, programming language, and project status.
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MarkText
A simple and elegant markdown editor
MarkText is an MIT licensed open source project, and the latest version will always be downloadable for free from the GitHub release page. MarkText is still in development, and its development is inseparable from all sponsors. Realtime preview (WYSIWYG) and a clean and simple interface to get a distraction-free writing experience. Support CommonMark Spec, GitHub Flavored Markdown Spec and selective support Pandoc markdown. Markdown extensions such as math expressions (KaTeX), front matter and emojis. Support paragraphs and inline style shortcuts to improve your writing efficiency. Output HTML and PDF files. Various themes: Cadmium Light, Material Dark etc. Various editing modes: Source Code mode, Typewriter mode, Focus mode. Paste images directly from clipboard. -
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Markdown Viewer
Markdown Viewer / Browser Extension
Markdown Viewer and Browser Extension. -
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Markdown
WeChat Markdown Editor
WeChat Markdown Editor | A highly concise WeChat Markdown editor, that supports Markdown syntax, color palette selection, multi-image upload, one-click document download, custom CSS style, one-click reset, and other features. Markdown documents are automatically rendered into WeChat graphics and text in real-time, so you no longer have to worry about the typesetting of WeChat articles! As long as you know the basic Markdown syntax, you can make a simple and beautiful WeChat graphic. Chrome browser is recommended for best results. In addition, for domestic (China) friends, accessing Gitee Pages will be relatively faster. The existing open-source WeChat Markdown editor has complicated styles and does not meet my personal aesthetic needs. When I use them for article typesetting, I often have to make some changes myself, which is time-consuming and labor-intensive, so I did secondary development. -
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The Homebrewery
Create authentic looking D&D homebrews using only markdown
The Homebrewery is a tool for making authentic-looking D&D content using Markdown. It is distributed under the terms of the MIT License. -
MongoDB Atlas runs apps anywhereMongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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StackEdit
In-browser Markdown editor
Unrivalled writing experience. StackEdit’s Markdown syntax highlighting is unique. The refined text formatting of the editor helps you visualize the final rendering of your files. StackEdit provides very handy formatting buttons and shortcuts, thanks to PageDown, the WYSIWYG-style Markdown editor used by Stack Overflow. Whether you write, you review, you comment… StackEdit's layout provides you with the flexibility you need, without sacrifice. StackEdit’s Scroll Sync feature accurately binds the scrollbars of the editor panel and the preview panel to ensure that you always keep an eye on the output while writing. StackEdit can sync your files with Google Drive, Dropbox and GitHub. It can also publish them as blog posts to Blogger, WordPress and Zendesk. You can choose whether to upload in Markdown format, HTML, or to format the output using the Handlebars template engine. -
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Marpit
The skinny framework for creating slide deck from Markdown
Marpit /mɑːrpɪt/ is the skinny framework for creating slide deck from Markdown. It can transform Markdown and CSS theme(s) to slide deck composed of static HTML and CSS and create a web page convertible into slide PDF by printing. Marpit is designed to output minimum assets for the slide deck. You can use the bare assets as a logicless slide deck, but mainly we expect to integrate output with other tools and applications. -
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lavish-axi
HTML is the new markdown. Lavish is the new editor for HTML artifacts
Lavish AXI is a local-first editor for reviewing and refining HTML artifacts produced by AI agents. It opens generated HTML in a browser so users can inspect the actual interactive result instead of relying on screenshots or long text descriptions. Users can pinpoint elements, select text ranges, annotate content, and send feedback directly back to the agent. Rendered Mermaid diagrams can also be edited as whiteboards. The tool is designed as an agent-native CLI with token-efficient output, long polling, and contextual disclosure. It can be used through an installable agent skill, run directly with npx, or integrated through session hooks and agent-plugin packaging. -
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MDX
Markdown for the component era
MDX lets you use JSX in your markdown content. You can import components, such as interactive charts or alerts, and embed them within your content. This makes writing long-form content with components a blast. -
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Markdown PDF
Markdown converter for Visual Studio Code
This extension converts Markdown files to PDF, HTML, PNG or JPEG files. -
Train ML Models With SQL You Already KnowBuild and deploy ML models using familiar SQL. Automate data prep with built-in Gemini. Query 1 TB and store 10 GB free monthly.
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react-markdown
Markdown component for React
React component to render markdown. This package is a React component that can be given a string of markdown that it’ll safely render to React elements. You can pass plugins to change how markdown is transformed and pass components that will be used instead of normal HTML elements. -
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(Un)colored
Next generation desktop rich content editor that saves documents
The next-generation desktop-rich content editor that saves documents with themes. HTML & Markdown compatible. For Windows, OS X & Linux. The main idea of (Un)colored is to focus on what you write. There are no distracting elements like multiple indicators & toolbars. When you're writing, the only things you see are your content, the caret, and your cursor. The toolbar appears when you select a portion of text, documents tabs & main menu when you move your cursor at the top of the window. Simple as that. (Un)colored includes classic & standard word processor tools like Bold, Italic, Links, etc., but also Web-oriented tools like videos from YouTube, Vimeo, Dailymotion, and even Twitch livestreams. You can even include any type of embed content to your documents like SoundCloud tracks, Facebook posts, etc. thanks to the Embed Content tool. -
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Markdownify
A minimal Markdown editor desktop app
Make changes, See changes. Instantly see what your Markdown documents look like in HTML as you create them. While you type, LivePreview will automatically scroll to the current location you're editing. The good old GitHub Flavored-style Markdown. So, you don't feel out of the place. Syntax highlighting in fenced code blocks with language identifiers and Markup languages. Change the color scheme of the editor based on your preferences. i.e to choose between Dark mode/Light mode. Supports emojis in the preview mode for when you need to express yourself via one. To clone and run this application, you'll need Git and Node.js (which comes with npm) installed on your computer. Markdowinfy is built using Electron, Node.js, and some more awesome software packages. -
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Smaug
Archive your Twitter/X bookmarks to markdown
Smaug is a developer tool for archiving Twitter (X) bookmarks — and optionally likes — into markdown files in an automated way, offering a simple means of preserving social media content in human-readable, version-controlled text. Named after the treasure-hoarding dragon, it uses the Twitter API (or community tools like the bird CLI) to fetch bookmarked posts and outputs them in markdown, making it easy to back up content for future reference or documentation. Smaug is designed for automation and integration into personal workflows, allowing users to run setup and export jobs from the command line with minimal configuration. It supports configuration through JSON and can be extended or scripted as part of broader personal knowledge management systems. Because the output is plain markdown, it fits well with static site generators and digital gardens — preserving links, text, and metadata in a format that’s both platform-independent and version-friendly. -
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markdown-it
Markdown parser, done right. 100% CommonMark support, extensions
markdown-it is a fast and extensible JavaScript-based Markdown parser designed to convert Markdown text into HTML while maintaining strict compliance with the CommonMark specification and offering additional syntax enhancements. It is widely used in web applications, documentation tools, and content platforms due to its high performance and flexibility. The library is built with a rule-based parsing system that allows developers to customize or replace syntax rules, making it adaptable to a wide variety of use cases. It also supports plugins that extend functionality, such as adding emoji support, footnotes, or custom containers, enabling highly tailored rendering pipelines. markdown-it emphasizes security by default, ensuring that generated HTML is safe for use in web environments without introducing vulnerabilities. Its architecture balances speed and extensibility, making it suitable for both lightweight applications and large-scale content systems. -
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bookdown
Authoring Books and Technical Documents with R Markdown
A open-source (GPL-3) R package to facilitate writing books and long-form articles/reports with R Markdown. Generate printer-ready books and ebooks from R Markdown documents. A markup language easier to learn than LaTeX, and to write elements such as section headers, lists, quotes, figures, tables, and citations. Multiple choices of output formats: PDF, LaTeX, HTML, EPUB, and Word. Possibility of including dynamic graphics and interactive applications (HTML widgets and Shiny apps) Support for languages other than R, including C/C++, Python, and SQL, etc. LaTeX equations, theorems, and proofs work for all output formats. Can be published to GitHub, bookdown.org, and any web servers. Integrated with the RStudio IDE. The easiest way to start a new Bookdown project is from within RStudio IDE. Go to File, New Project, New Directory, Book project using bookdown. -
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remarklint
plugins to check (lint) markdown code style
remark plugins to check (lint) markdown code style. remark is an ecosystem of plugins that work with markdown as structured data, specifically ASTs (abstract syntax trees). ASTs make it easy for programs to deal with markdown. We call those programs plugins. Plugins inspect and change trees. You can use the many existing plugins or you can make your own. -
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CodiMD
Realtime collaborative markdown notes on all platforms
CodiMD lets you collaborate in real-time with markdown. Built on HackMD source code, CodiMD lets you host and control your team's content with speed and ease. HackMD helps developers write better documents and build active communities with open collaboration. HackMD is built with one promise - You own and control all your content. -
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Dillinger
The last Markdown editor, ever
Dillinger is a cloud-enabled, mobile-ready, offline-storage compatible, AngularJS-powered HTML5 Markdown editor. Markdown is a lightweight markup language based on the formatting conventions that people naturally use in email. The overriding design goal for Markdown's formatting syntax is to make it as readable as possible. The idea is that a Markdown-formatted document should be publishable as-is, as plain text, without looking like it's been marked up with tags or formatting instructions. Dillinger uses a number of open source projects to work properly. Dillinger uses Gulp + Webpack for fast developing. Make a change in your file and instantaneously see your updates! Dillinger is very easy to install and deploy in a Docker container. -
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DOCX Document Converter
Convert .docx to .md/.txt and .html. Free, unlimited, fast.
A simple, free, unlimited, secure web-based tool that converts Microsoft Word documents (.docx) into Markdown (.md/.txt) and HTML files. Perfect for developers, writers, and anyone who needs to transform .docx MS Office Word documents into web-friendly or AI context friendly formats. Unlike those other jerks on the web that charge many dollars per month for this, I made it free, unlimited and open source. This is a better version of 'convert docx to txt' since .md files can be opened in notepad++ just the same AND they preserve formatting too! Meanwhile HTML files will even embed images allowing you to view them just like they were in the original document. -
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Neiki's Markdown Editor
Live Markdown editor with real-time GitHub-styled preview
Neiki's Markdown Editor is a lightweight, browser-based live Markdown editor that provides instant preview in a clean GitHub-style layout. It allows users to write Markdown on one side and see rendered output in real time on the other, with full support for GitHub Flavored Markdown, syntax highlighting, and responsive split-pane editing. Built with vanilla JavaScript and CDN-based dependencies, it requires zero setup or build tools. The editor includes a modern toolbar, keyboard shortcuts, dark/light theme switching, export to .md, and mobile-friendly interface. It is designed for simplicity, performance, and safe rendering with built-in XSS protection. -
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Obsidian MEDILIG
Obsidian MEDILIG (Medical Life Guard) App Local-First Offline-First
Obsidian MEDILIG (Medical Life Guard): An easy-to-use, flexible, secure, cross-platform medical knowledge management system for patient's Electronic Health Record (EHR) that is built on top of Obsidian software application for the design, implementation and use of autonomous, multilingual, clinical documents from primary care to continuing care. -
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BoostNote Legacy
Real-time collaborative writing
Note-taking app for programmers. App is available for Mac, Windows and Linux. Built with Electron, React + Redux, Webpack, and CSS modules. Write overviews of systems including concepts, terminology definitions and descriptions of how these concepts work together. Having a 'living document' to help drive dialogue and exchange of ideas through collaboration helps this process significantly. It’s time to aggregate your knowledge in a single place. Build a team-wide knowledge management system to solve the information silos. Organize your dev team's sprint backlog and visualize them with status, assignees, reviewers, due date and everything you need. Reduce repeated progress updates in the company chat and standup meetings. Collaborate with your teammates in a doc with Boost Note's real-time editing. Boost Note's editor makes it easy to write a tech spec with Charts.js, Mermaid, Latex, PlantUML and so on. -
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Civilizer
Civilizer - Tool to efficiently manage your data/knowledge/idea
Civiilzer is a Dedicated Personal Knowledge Management Tool built by Java. You can use it for purposes such as a high level note application, document store, information hub, etc. With Civilzer's Markdown editor, you can edit text in Markdown format, but the editor provides a lot more additional features, so you can edit your content in a more stylish fashion. You can structure and organize your data with tagging, relating, bookmarking. Civilizer's full text search functionality is simple but powerful. You can search with simple space separated keywords as other tools, but unique Civilizer Search Operators can boost your search ability a lot further. Your search phrase can be fine-tuned as far as you can go. Another useful feature is its multi-panel view. It helps you view multiple data in the same screen eliminating the need to jump across separate pages. Also Civilizer has its own file system. You can store any file with Civilizer and link files to Civilizer's regular data. -
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CleanTexttools
Open-source browser-based utility for removing markdown artifacts, hid
CleanTextTools Core is the open-source edition of CleanTextTools, a browser-based utility for cleaning text generated by ChatGPT, Claude, Gemini and other AI assistants. The Core edition helps users remove common formatting artifacts while preserving the original wording and meaning of their content. Core features include: * Remove common markdown formatting * Fix inconsistent spacing and line breaks * Remove hidden Unicode characters * Remove emojis * Copy cleaned text * Process text directly in the browser * Run locally without creating an account CleanTextTools Core is intended for developers, writers, students, marketers and professionals who need clean, paste-ready text for documents, emails, websites and productivity platforms. This SourceForge project contains the limited open-source Core edition. The complete hosted product, including additional cleaning options and platform-specific tools, is available at CleanTextTools.com. -
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Editor.md
The open source embeddable online markdown editor (component)
The open source embeddable online markdown editor (component), based on CodeMirror & jQuery & Marked. The available dependents are CodeMirror, marked, jQuery, FontAwesome, github-markdown.css, KaTeX, prettify.js, Rephael.js, flowchart.js, sequence-diagram.js, and Prefixes.scss. You can enable HTML tags decode, TeX, Flowchart, sequence diagram, Emoji, FontAwesome, task lists. You can also enable image upload, [TOCM], search replace features, code fold, etc. Combine multiple JS module files used by CodeMirror to greatly reduce HTTP requests and speed up downloading. In addition, when using Require.js, because of CodeMirror's strict module dependency restrictions, the merged module files cannot be used, and multiple module files are still dynamically loaded. Newly added images, links, anchor links, code blocks, pre-formatted text and other operations pop-up dialog layers and examples.
