Flow Diagram

Flow Diagram turns plain text into clear sequence diagrams and flowcharts, on Mac and iPad. Type a few lines and the preview draws itself as you write. Sketch with Apple Pencil and your boxes and arrows become a tidy diagram. Photograph a whiteboard and Apple Intelligence reads it into text you can edit. DIAGRAMS AS TEXT • Write sequence diagrams and flowcharts in a simple, readable language; the preview follows every keystroke. • Tap any shape or arrow to jump to the line that draws it, and see the line you're editing outlined in the preview. • Mistakes are listed as you type, with the line to fix. • Keep several diagrams in one file. Files are plain text, so they work with version control, search and any editor. • Format Text tidies the layout; touch and hold an arrow to reverse it. SEQUENCE DIAGRAMS Participants, actors, databases, queues and more; solid, dotted, open, async and failed messages; activations; notes and references; alt, opt, loop, par, critical, region, break, neg and group frames; dividers, numbering and colours. Everything Sequence Diagram's native format and Mermaid sequence diagrams can express. FLOWCHARTS Ten node shapes, from decisions to databases; solid, dotted, thick and two-way connectors; nested clusters; and automatic layout in any direction. SKETCH WITH APPLE PENCIL (iPad) Draw boxes, ovals, diamonds and arrows and write labels by hand. Flow Diagram recognises them as you draw and keeps the diagram's text in step. Double-tap or squeeze the Pencil to erase, and let Apple Intelligence tidy the result. IMPORT FROM A PICTURE Turn a whiteboard photo, a screenshot or a paper sketch into an editable diagram. Take a photo, scan a page, pick from Photos or paste an image. Flow Diagram works out whether it's a sequence diagram or a flowchart, checks the direction of every arrow, and shows the result beside the picture before you insert it. OPEN AND EXPORT ANYWHERE • Opens and saves Sequence Diagram (.msd) and Mermaid files. • Exports SVG, PNG and PDF, and editable OmniGraffle documents. • Quick Look previews and Spotlight search for your diagrams. • Light and dark themes. BUILT FOR AI AGENTS Because diagrams are text, AI coding agents can read and write them directly. The free fdiag command-line tool and its MCP server let agents check their work, draw diagrams and convert formats, and point you to a step in the open document. PRIVATE BY DESIGN No account, no tracking, no analytics. Your diagrams stay on your devices. Picture import uses Apple Intelligence with Private Cloud Compute, so pictures are processed privately by Apple. One purchase covers Mac and iPad. Picture import and Tidy with AI need Apple Intelligence on macOS or iPadOS 27 and a network connection. Handwriting recognition needs iPadOS 27.