Hubble.md review
A focused desktop Markdown workspace with search, comments, and file-based workflows.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Hubble.md is a free, open-source desktop note-taking app built around Markdown files and HTML. It is aimed at people who want to write, browse, and search notes in a file-based workspace, as well as users who work with coding agents. Official desktop builds support macOS, Windows, and Linux. Markdown shortcuts, slash commands, file properties, and frontmatter support give the editor a structured writing workflow without moving notes out of the filesystem.
The strongest fit is its connection to an existing notes folder. Hubble.md can live-reload changes made by agents, while workspace browsing covers files and folders directly. Full-text search helps locate content across the workspace, and review comments with threaded replies support discussion on notes. The app also supports PDF and image viewing, plus building and viewing HTML-based apps from note folders. These features make it more than a plain editor for users whose notes include mixed file types or agent-generated changes.
Hubble.md keeps its scope narrow: Markdown files, desktop access, and file-oriented workflows are central. Its verified organization features are limited, and sharing, integrations, and offline support are also limited. That makes it a reasonable choice for desktop users who value open-source software, local Markdown files, and direct folder access. Users looking for broader collaboration, deeper note organization, or a wider integration ecosystem should choose a more expansive note-taking app instead.
Hubble.md pros and cons
- Where it wins
- Free and open source across macOS, Windows, and Linux
- Markdown editing with shortcuts, slash commands, and frontmatter
- Full-text search, threaded comments, PDF, and image viewing
- Where it doesn't
- Limited verified note-organization features
- Limited sharing and integration options
- Offline support is limited
Hubble.md fact sheet, pricing and score →
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