About
SankeyFlow is a native macOS app for building Sankey diagrams, the flow charts that show how a total splits and merges as it moves from one place to another. It works for budgets, energy use, website traffic, headcount, material flows, and any other total that divides into parts. You can build a chart three ways: by writing text syntax, by arranging rows in a visual builder, or by importing data from a spreadsheet such as Excel, Numbers, CSV, or XLSX.
The app runs entirely on your Mac, with no account, no sign-in, and no network access. Documents are plain-text .sankey files with autosave, a version history you can browse and restore, and tabs for several charts in one window. Styling covers flow direction, node and ribbon appearance, colors, labels, units, backgrounds, and how leftover amounts are shown as a remainder. Charts can be exported as PNG, PDF, or SVG, with a choice of aspect ratio, resolution, and margins, and a live preview. SankeyFlow requires macOS 26 (Tahoe) or later and is made by Creixems Studio.
What's new
All release notesNEW • Remainder. When a box receives more than it passes on (or less), show the difference as a gray Remainder box, send it to a box you choose, or leave a gap. Set it for the whole chart or for individual boxes. • Version history. Browse earlier versions of your chart in the side panel, preview one, and restore it. • Tabs. Open several charts in one window with ⌘T. • Export tab. PNG, SVG and PDF are one click away in the side panel. • Text Input Guide. A built-in guide to writing data, from the Text tab or the Help menu. • A new app icon and a refreshed look: Liquid Glass tabs, a redesigned side panel and a built-in color picker that updates live. IMPROVED • Fields in the Data tab respond instantly, and clicking outside a field finishes editing. • Click a field that already has a name to see suggestions and swap it for another. • Long names wrap onto up to three lines instead of running off the edge, on screen and in exports. • Fewer crossing ribbons when flows skip a column. • Better VoiceOver labels for sliders, switches and export options. • The Type tab is now called Text. FIXED • Opening a file in the Data tab could remove per-flow colors or lines with typos. Your text is now left exactly as you wrote it until you change it.