Rendered in place
Headings, lists, tables, code, and math render where you write. Move the cursor into any block to edit the source.
A local Markdown app for AI-human collaboration
Local files. Live Preview. Rendered diff.
Open the folders where you and your AI work together: notes, docs, and repos.
Live Preview
What you see is what you get.
No preview pane to switch between. Edit and read in the same view, while your plain .md file stays the source of truth.
Source of truth
Your file is plain .md. Open it in any editor or ship it anywhere. Resomark renders it without reformatting.
Rendered diff
Review changes as rendered Markdown.
For Git-tracked files, Resomark highlights additions, removals, and edits inside the rendered document, so you can review AI-written changes in context before you keep them.
Local workbench
Pin every folder you actually work in.
No database. Just the folders on your Mac, pinned in one sidebar.
Lighter than your IDE
AI-driven development does not need a full IDE. Resomark opens any repo and previews every code file.
Lighter than Obsidian
Native and fast. No plugin store, no setup. Open any folder as a vault. [[Wiki-link]] works out of the box.
Pin everything that matters
Notes, skills, AI configs, and dotfiles live in fixed places. Pin them in one sidebar and edit them without moving a file.
Markdown support
Advanced Markdown, rendered in place.
Math, diagrams, code, wiki links, and image embeds. Rich documents stay plain text.
Default opener
Use Resomark as the instant opener for .md, code, and text files.
Quick Look from Finder
Press Space to preview Markdown, code, and text files.
Fast cold start
Built for speed, even with 100,000+ Markdown files.
Native, not Electron
A Swift app built with native Mac components.
Get Resomark for Mac.
Use the direct Mac download for the best experience and faster updates.
Good to know
A few practical details.
Is Resomark an AI app?
No. Resomark does not generate text. It works next to the AI tools you already use, as a review and editing layer for local Markdown files.
Does Resomark upload my documents?
No. Resomark opens local files selected by you. Your documents stay on your Mac as normal Markdown and plain text files.
Which macOS versions are supported?
Resomark currently supports macOS 14 or later.