What it does
Zyplus is a free, open-source desktop Markdown editor that stores notes as ordinary `.md` files. The official site describes rich-text and raw-Markdown editing, inline Mermaid diagrams and KaTeX math, themes, keyboard commands, and PDF export. It ships for macOS, Windows, and Linux without an account or built-in sync; users can keep the same folders available on other computers through their own file-sync method.
Write Markdown without moving files into a hosted notebook
Zyplus is designed around folders the user already owns: its product page says that notes remain as .md files, and the editor can switch between rich-text and raw-Markdown modes. A practical use is to keep a small project notebook in an existing folder, then add diagrams or math as Markdown fences when the notes need them. The site also describes themes, keyboard-first commands, and export to PDF.
The current release page lists v0.3.0 on 2026-09-30, and the official license is MIT. The project's FAQ says it has no account or paid sync tier; the README suggests bringing your own file synchronization if you want notes on multiple computers. That keeps ownership simple but means synchronization and backup are the user's responsibility. I did not install the editor, edit a Markdown file, or test PDF export or external sync.
Strengths
- Ordinary Markdown files in user-selected folders remain usable outside the editor.
- The editor offers both rich-text and raw-Markdown modes, with Mermaid and KaTeX rendering listed by the project.
- The site lists native desktop builds for macOS, Windows, and Linux, with no account required.
Watch out for
- There is no built-in account or sync service, so cross-device sync and backups need to be arranged separately.
- The current release is 0.3.0, so the product is a relatively early-stage editor rather than a mature hosted notes service.
Best for
- People who want a minimal Markdown notes editor that leaves files in their own folders
- Writers who want diagrams and math in local Markdown without a subscription or account
Sources
- Zyplus | Official Product Site (Oct 25, 2026)
- Zyplus Editor | Official Repository (Oct 25, 2026)
- Zyplus Editor Releases | GitHub (Oct 25, 2026)
- MIT License | Zyplus Editor (Oct 25, 2026)