About Diagram Maker
Diagram Maker is a mobile-first diagramming tool for anyone who thinks in pictures. Build flowcharts, entity-relationship diagrams (ERDs), org charts, mind maps, and free-form sketches directly on your phone. Drop shapes onto the canvas, drag them around, resize and rotate with a fingertip, and connect them with labelled arrows — or switch to the text-based editor and type your diagram as code. The shape library covers rectangles, circles, diamonds, hexagons, parallelograms, cylinders, and more, with full control over fill colour, stroke, font, corner radius, and opacity. Lasso-select to move groups, pinch to zoom, two-finger drag to pan, and auto-snap to a grid for clean alignment. Every change supports undo and redo. When you're done, export your diagram as a 2× PNG image, a single-page PDF, an editable SVG vector, or a diagram-as-code file for any text-based workflow. Everything runs on your device — no login, no cloud upload, no waiting on a server. Your diagrams stay on your phone unless you choose to share them. Built mobile-first with a calm dark theme where the canvas fills the screen, Diagram Maker is available in 15 languages.
Everything You Need
Visual Drag-and-Drop Canvas
Drop shapes onto the canvas, drag to move, drag corners to resize, and drag the centre dot to rotate. Lasso-select multiple shapes and move them as a group. Pinch to zoom and two-finger drag to pan.
Flowcharts, ERDs & More
Build flowcharts with start, decision, action, and end nodes; ERDs for database design; org charts, mind maps, and idea trees. Rectangles, circles, diamonds, hexagons, cylinders, and more cover any layout.
Diagram-as-Code Editor
Prefer typing? Switch from the visual canvas to a text-based editor and write your diagram in plain text. Sequence and Gantt diagrams are built straight from code. Move between visual and code views any time.
Style Every Shape
Set fill colour, stroke, font, corner radius, and opacity on any shape. Double-tap to edit labels. Connect shapes with labelled arrows. Auto-snap to grid keeps everything cleanly aligned. Undo and redo every change.
Export to Any Format
Export a 2× resolution PNG, a single-page PDF sized to your diagram, an editable SVG vector for any vector tool, or a diagram-as-code file compatible with any diagram-as-code workflow.
Offline & Private
Everything runs on your device. No login, no cloud upload, no waiting on a server. Your diagrams are saved locally and stay on your phone unless you choose to share them. Available in 15 languages.
Ready to Try Diagram Maker?
Free to download. No account required. Available on Android and iOS.
Frequently Asked Questions
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