Your Markdown lives in a dozen folders. Most of the time you don't want to write — you just want to read one section. Every Markdown tool is a writing app with a preview pane. MuM is the opposite: a native macOS reader with no web engine inside — all AppKit. Several projects open at once, each remembering where you stopped. Cross-project search. Typesetting tuned for CJK as well as Latin. ~0.3s cold start, 1.7 MB download, 100+ fps scrolling a 5 MB document. Open source, MIT.
0.3 second open time is the number that'd actually make me switch, most "markdown viewer" apps still boot like a full editor even when all you want is to read one file. what's the differentiator versus just using Quick Look or Marked 2 for the read-only case, is it the multi-folder project view, or something in the rendering itself?
I'd genuinely like to know where you get stuck — what's the first thing you do
after opening it, and where do you pause for more than five seconds?
About MuM on Product Hunt
“A reading-first Markdown engine for macOS”
MuM launched on Product Hunt on September 28th, 2026 and earned 92 upvotes and 4 comments, placing #13 on the daily leaderboard. Your Markdown lives in a dozen folders. Most of the time you don't want to write — you just want to read one section. Every Markdown tool is a writing app with a preview pane. MuM is the opposite: a native macOS reader with no web engine inside — all AppKit. Several projects open at once, each remembering where you stopped. Cross-project search. Typesetting tuned for CJK as well as Latin. ~0.3s cold start, 1.7 MB download, 100+ fps scrolling a 5 MB document. Open source, MIT.
MuM was featured in Open Source (68.9k followers), Developer Tools (520.2k followers) and GitHub (41.4k followers) on Product Hunt. Together, these topics include over 131.6k products, making this a competitive space to launch in.
Who hunted MuM?
MuM was hunted by IceskYsl. 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.
Want to see how MuM stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
IceskYsl
0.3 second open time is the number that'd actually make me switch, most "markdown viewer" apps still boot like a full editor even when all you want is to read one file. what's the differentiator versus just using Quick Look or Marked 2 for the read-only case, is it the multi-folder project view, or something in the rendering itself?