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Diagrammar
Mermaid, PlantUML, D2 & DOT — native on iPhone, iPad & Mac
Open or paste Mermaid, PlantUML, D2 or Graphviz DOT and get a real interactive diagram, rendered natively with no hidden WebView. Offline, no account, iCloud sync, Finder preview. Viewing is free; $14.99 once unlocks editing and export.
Hey Product Hunt 👋
I write my diagrams the way I write code: in text. Mermaid for flowcharts, PlantUML for class diagrams, D2 when I want it to look good, Graphviz DOT when the graph is big enough that I want a real layout engine.
None of which renders on my iPhone or iPad.
So I wrote the renderer instead. DiagramKit, my engine, parses all four formats into a native representation, lays them out with real graph-layout engines, and draws them as SwiftUI views. No WebView, no JavaScript runtime, and the app makes no network calls (if your files live in iCloud Drive, the system syncs them).
• Paste anything; it works out which language it is.
• Open a README and every fenced mermaid / d2 / ```dot block renders inline, prose in between.
• Press space on a diagram in the Finder for Quick Look; in Files and Finder, diagram files get a rendered thumbnail instead of a page icon.
Viewing is free, forever: all four formats, every device, no account, no trial. Editing, export, Markdown mode and the share extension are a one-time $14.99. No subscription. Family Sharing on. One purchase covers iPhone, iPad and Mac.
DiagramKit is also an SDK I license to other apps; Diagrammar is its live demo.
Tell me which diagram language you actually use, and what breaks. I test against a 700-file corpus and still expect your file to find the bug.
— Bakhtiyor
Diagrammar was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #160 on the daily leaderboard. Open or paste Mermaid, PlantUML, D2 or Graphviz DOT and get a real interactive diagram, rendered natively with no hidden WebView. Offline, no account, iCloud sync, Finder preview. Viewing is free; $14.99 once unlocks editing and export.
On the analytics side, Diagrammar competes within iOS, Productivity and Developer Tools — topics that collectively have 1.3M followers on Product Hunt. The dashboard above tracks how Diagrammar performed against the three products that launched closest to it on the same day.
Who hunted Diagrammar?
Diagrammar was hunted by Bakhtiyor Khodjayev. 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 Diagrammar including community comment highlights and product details, visit the product overview.
Bakhtiyor Khodjayev