Open Source Markdown Editor
Markdown's appeal is that the file stays plain text anyone can read, so the question for an editor is less about features than fidelity: does it leave your source clean, or quietly rewrite tables, mangle line breaks, and bury your writing in a database? The dialects also differ, since headings and links behave the same everywhere but tables, footnotes, math, and diagrams do not. The open source editors here treat the .md file as the source of truth rather than an export, render a live preview without trapping your text in a proprietary container, and push the same file to a website, a PDF, or a repository unchanged. Portability is the whole point, so pick the one whose output survives your publishing target.
MarkText
Open-source Markdown editor with real-time preview and live rendering
Joplin
Offline-first Markdown note and to-do app with encrypted sync across desktop and mobile
SiYuan
Privacy-first personal knowledge management with Markdown WYSIWYG, block references, and Docker hosting
Zettlr
Markdown publication workbench for researchers, journalists, and writers with citations and Pandoc exports
ghostwriter
Distraction-free Markdown editor for Windows and Linux with live HTML preview and export processors
ReText
Editor for Markdown, reStructuredText, Textile, AsciiDoc, and custom markup languages
Marker
GTK+3 Markdown editor for Linux with scientific syntax, math, diagrams, and Pandoc exports
Vivliostyle
Open source CSS typesetting engine for HTML, EPUB, and web publications
Our picks
These split into plain-text writers and markdown-based note apps, so pick by the job.
Best for everyday writing: MarkText MarkText is a clean, keyboard-friendly editor with a real-time preview that stays out of your way. It supports CommonMark, GitHub Flavored Markdown, and selective Pandoc Markdown, plus KaTeX math, front matter, and emoji, and exports to HTML and PDF. Source Code, Typewriter, and Focus modes cover most writing moods on Windows, macOS, and Linux.
Best for research and publishing: Zettlr Zettlr is a workbench for researchers, journalists, and long-form writers. It handles citations through Zotero and JabRef, supports a Zettelkasten workflow and full-text search, and exports drafts through Pandoc, LaTeX, and Textbundle with LaTeX and Word templates. It runs on Windows, macOS, and Linux.
Best for notes across devices: Joplin Joplin is the pick when notes must sync privately across desktop and mobile. It is offline-first, keeps searchable Markdown notes in notebooks, and offers end-to-end encrypted sync through Nextcloud, Dropbox, OneDrive, or Joplin Cloud. It imports Evernote exports and plain Markdown, and a web clipper saves pages straight into your notes.
Best for distraction-free drafting: ghostwriter ghostwriter keeps files as ordinary Markdown text and strips the screen down to the writing. It ships the cmark-gfm processor and auto-detects Pandoc, MultiMarkdown, or cmark to enable live HTML preview and export. It runs on Windows and Linux as part of KDE's ecosystem.
Matching a markdown editor to how you write
Three very different tools hide under this label, and picking the wrong category is the real mistake. Some are pure plain-text editors that touch nothing but your file: ghostwriter offers a distraction-free surface with live HTML preview and hands export off to Pandoc or cmark, and ReText covers Markdown alongside reStructuredText, Textile, and AsciiDoc for people who juggle markup formats. Others are knowledge bases that happen to speak Markdown, like SiYuan and Joplin, which add notebooks, block references, search, and sync but keep more of your content inside their own model. A third group is publication pipelines.
That third group aims your writing at a finished document. Zettlr is a workbench for researchers and journalists, wiring in Zotero citations and exporting through Pandoc, LaTeX, and Textbundle, while Marker adds scientific syntax, KaTeX math, and Mermaid diagrams on Linux. Whatever the category, test round-trip fidelity with your real files, not sample text: open a document with tables, nested lists, code fences, and front matter, edit it, and confirm the saved file still matches what your publishing target expects.
Then settle where the source of truth lives. Folder-based editors keep ordinary files you can back up, diff, and move between tools, while database-backed apps trade some of that portability for faster search and backlinks, so their export quality matters more. If you write across desktop and mobile, test the sync conflict behavior with real edits before you trust it with a large library.
Related categories
Frequently asked questions
Which markdown flavor should I write in?+
Write in the flavor your final destination understands. Documentation sites, issue trackers, and static site generators disagree on tables, task lists, footnotes, math, and how line breaks are treated. MarkText, for example, supports CommonMark, GitHub Flavored Markdown, and selective Pandoc Markdown, which covers most targets. If your files must travel across many tools, stay close to basic syntax and avoid editor-specific extensions that another renderer will show as plain text.
Is a WYSIWYG editor better than a split-source view?+
It depends on who is writing. A WYSIWYG surface like MarkText's real-time preview or SiYuan's block editor is friendlier for people who would rather not see raw markup. Source-first editing, where you see the plain text with a preview pane, is better when whitespace, code blocks, and front matter matter, or when you review diffs in version control. For technical writing headed into Git, source-first usually wins.
Can these export to PDF, Word, or LaTeX, not just HTML?+
Several lean on Pandoc for exactly this. Zettlr exports through Pandoc, LaTeX, and Textbundle with template support for publication drafts, Marker converts to PDF, RTF, ODT, and DOCX through Pandoc, and ghostwriter auto-detects Pandoc, MultiMarkdown, or cmark to enable export. MarkText handles HTML and PDF directly. If a specific output format is part of your workflow, confirm the editor either bundles the processor or can find it on your system PATH.
Is a markdown editor the same as a note app?+
Not quite. A pure editor like ghostwriter or ReText opens and saves files and stays out of the way, leaving organization to your filesystem. Note apps such as Joplin and SiYuan store markdown but wrap it in notebooks, tagging, full-text search, block references, and sync, so they manage a library rather than a single file. Choose an editor if you want plain files; choose a note app if you want a searchable knowledge base.
How do these handle pasted images and attachments?+
Attachment handling is easy to overlook and painful to fix later. Check whether pasted images get sensible filenames, whether links are stored as relative paths, and whether moving a file keeps its images attached. MarkText, for instance, can paste images straight from the clipboard, and Joplin keeps attached resources with the note. For shared documents, favor workflows where images live beside the markdown or in a clear assets folder rather than only in an app cache.
Which of these run on Linux or across every platform?+
Coverage varies widely. Marker is Linux-only and built on GTK+3, while ghostwriter targets Windows and Linux. MarkText, Zettlr, ReText, and SiYuan run on Windows, macOS, and Linux, and Joplin and SiYuan add Android and iOS for editing on the go. If you move between operating systems, pick one of the cross-platform apps so your workflow and shortcuts carry over.
Can I write research papers with citations in markdown?+
Yes, and one tool here is built for it. Zettlr is a publication workbench for researchers and journalists that connects to reference managers like Zotero and JabRef, supports a Zettelkasten workflow and full-text search, and exports finished drafts through Pandoc and LaTeX with Word and LaTeX templates. If your writing ends in cited, formatted documents, that citation and export pipeline is the feature to weigh most.