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HydroMark
A New And Modern Markdown editor Addin For Microsoft OneNote
HydroMark is a WYSIWYG Markdown editor add-in for Microsoft OneNote. Type Markdown naturally inside OneNote and see formatted output instantly It turns OneNote into a real technical-note workspace: code highlighting, LaTeX math, Mermaid / ZenUML diagrams, slash commands, tables, and source/rendered dual views. Plus page-width control and seamless import/export for when you do need a file. Built for developers, students, and technical writers who love OneNote but can’t live without Markdown.
I built HydroMark because I love taking notes in OneNote but can't live without Markdown. Existing tools either forced me to write elsewhere and export, or broke OneNote's native experience.
HydroMark is a WYSIWYG Markdown add-in that sits right inside OneNote—type Markdown, hit Enter, and see it rendered instantly. No exports, no app switching.
We also added LaTeX, Mermaid diagrams, code highlighting, and slash commands, because technical notes deserve more than bold text and bullet lists. A special mention goes to the slash commands and highlight blocks: a big part of why I built this add-in was exactly those—that's what makes note-taking feel truly modern.
And this is just the start: I'll be gradually layering AI features on top over time. Let me know what you'd love to see next!
About HydroMark on Product Hunt
“A New And Modern Markdown editor Addin For Microsoft OneNote”
HydroMark was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #133 on the daily leaderboard. HydroMark is a WYSIWYG Markdown editor add-in for Microsoft OneNote. Type Markdown naturally inside OneNote and see formatted output instantly It turns OneNote into a real technical-note workspace: code highlighting, LaTeX math, Mermaid / ZenUML diagrams, slash commands, tables, and source/rendered dual views. Plus page-width control and seamless import/export for when you do need a file. Built for developers, students, and technical writers who love OneNote but can’t live without Markdown.
On the analytics side, HydroMark competes within Productivity, Notes and Education — topics that collectively have 747.7k followers on Product Hunt. The dashboard above tracks how HydroMark performed against the three products that launched closest to it on the same day.
Who hunted HydroMark?
HydroMark was hunted by HydroLinX. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of HydroMark including community comment highlights and product details, visit the product overview.
HydroLinX