Zettlr: Open-source Free Markdown editor for professionals (Free software)

Zettlr is a free open-source Markdown editor for professional writers, developers, researchers, journalists, bloggers and content creators.

It allows you to write your files in a Markdown format and make a use of the YAML header metadata that is widely used by many ope-source blogging platforms.

With Zettlr you can open a folder that contains several Markdown files, open many of them using the handy tabbed interface, browse your files content easily, and connect your file knowledge.

Researchers would love Zettler, as it comes with citiations support, Zotero integration, full Zettelkasten support, multi-languages support, word counter, writing statistics and more.

Another reason why we love Zettler, is its ability to handle large Markdown files, and its fast built-in full-text search.


  • Available in over a dozen languages
  • Supports light and dark theme
  • Tight and ever-growing integration with your favourite reference manager (such as Zotero or JabRef)
  • Supports file head YAML format
  • Built-in theme support
  • Clutter-free editor
  • Comes with a dozen of handy shortcuts that boosts your productivity
  • Supports tags
  • Built-in file browser
  • In-file content browser
  • Minimal WYSIWYG editor
  • Comes with a tabbed interface that supports many documents
  • Cite with Zettlr using citeproc and your existing literature database
  • Five themes and dark mode support
  • File-agnostic writing: Enjoy full control over your own files
  • Keep all your notes and texts in one place — searchable and accessible
  • Code highlighting for many languages
  • Simple and beautiful exports with Pandoc, LaTeX, and Textbundle
  • Support for state-of-the-art knowledge management techniques (Zettelkasten)
  • A revolutionary search algorithm with integrated heatmap


Zettler is an open-source app that is released under the GPL-3.0 License.


macOS Windows and Linux


GPL-3.0 License


markdown,editor,editors,markdown editor,office,pdf,txt,productivity



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Hazem Abbas

Written by Hazem Abbas

Medical Doctor by trade, but also a software developer. Linux Avid user. I write primary; open-source medical apps, dev tools and libraries I use, and off-topic like horse riding.
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