# MacDownApp/macdown

Open source Markdown editor for macOS.

Repository: https://github.com/MacDownApp/macdown
Canonical: https://ross.abutalabs.com/products/macdown
Homepage: https://macdown.uranusjr.com/
Language: Rich Text Format
License Family: other
Topics: markdown, markdown-editor, markdown-to-html, markdown-convertor, markdown-writer, markdown-viewer, markdown-converter, objective-c, cocoa, macos, xcode
Last push: 2023-07-10T22:19:38+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4455, "days_push": 1150, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 9819, forks 1171 (observed 2026-08-28T04:10:37.346499+00:00)

## What it is
MacDown is an open source Markdown editor for macOS with live HTML preview, built in Objective-C/Cocoa. It offers configurable Markdown rendering, syntax highlighting in fenced code blocks, TeX math support, and auto-completion.

## Use cases
- write markdown documents on mac with live preview
- convert markdown to html
- edit readme files with syntax highlighting
- preview github-flavored markdown locally
- write documentation with math and task list support

## When to choose
- you use macOS and want a free, native Markdown editor
- you need customizable Markdown-to-HTML rendering with live preview
- you want Mou-style editing with themes and code block highlighting

## When to avoid
- you need a cross-platform editor
- you require frequent updates or long-term active support
- you need a license file shipped in the repo (license is stated as MIT on the site but absent from the repo)

## Facets
- artifact type: application
- maturity: maintenance
- function: editor, markdown, templating
- domain: text-editors, documentation, web-development
- platform: -
- tags: markdown-editor, live-preview, syntax-highlighting, objective-c, cocoa, open-source, macos, desktop

## Member repositories
- MacDownApp/macdown (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:37.346499+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:20:57.260972+00:00, confidence not recorded.
  - readme: https://github.com/MacDownApp/macdown (fetched 2026-08-28T04:10:37.346499+00:00, sha 0606ab39a6f2)
  - homepage: https://macdown.uranusjr.com/ (fetched 2026-08-29T08:20:32.352137+00:00, sha 2263e82c2f78)
  - site_page: https://macdown.uranusjr.com/features (fetched 2026-08-29T08:20:32.355122+00:00, sha b09814599395)
  - site_page: https://macdown.uranusjr.com/faq (fetched 2026-08-29T08:20:32.357735+00:00, sha a56ad9586e32)
- Data as of 2026-08-30T08:39:29.467469+00:00.