Network Graph Builder

Network Graph Builder turns your phone into a pocket graph studio. Sketch a network with your fingertip, type it out as plain text, or start from a ready-made template. Then analyze it with real graph-theory tools.

Use it for social networks, org charts, transit maps, system architecture, mind maps, food webs or your next homework assignment.

DRAW ANY NETWORK
• Double-tap to drop a node, switch to Link mode to connect nodes
• Directed, undirected and two-way links with weights and labels
• Colors, sizes and shapes: circle, square, diamond, hexagon, star and more
• Undo and redo, snap to grid, live physics and fullscreen canvas
• Find any node instantly with search

TYPE IT, SEE IT
Build a whole graph from simple text:
Farm -> Co-op, Exporter
Co-op -- Exporter [2]
Café <-> Customer
Fan-outs, weights, labels and comments are all supported.

AUTOMATIC LAYOUTS
Force-directed, circle, grid, hierarchy, radial and concentric layouts tidy up your graph in one tap. You can tune repulsion, link distance and gravity.

INSTANT ANALYTICS
• Nodes, links, components, density, average degree, diameter, average path length and clustering coefficient
• Key-node rankings by degree, betweenness, closeness and PageRank
• Centrality heatmaps drawn right on your graph

BUILT-IN ALGORITHMS
• Shortest path (Dijkstra), weighted or unweighted
• Connected components
• Community detection (Louvain) with modularity score
• Minimum spanning tree
• Breadth-first search, animated step by step
• Cycle detection

13 TEMPLATES
Friend circle, city roads, org chart, star, binary tree, ring, complete graph, mind map, microservices, food web, neural net, Zachary's karate club and the Petersen graph.

SAVE, IMPORT & EXPORT
• Keep a library of your graphs and reopen them anytime
• Export as PNG, HD PNG, SVG, JSON, CSV or text
• Import JSON (D3, Cytoscape or native format), CSV edge lists or text files

9 BEAUTIFUL THEMES
Light and dark themes (Plexus, Blueprint, Atlas, Obsidian, Lichen, Arctic, Circuit, Nebula and Ember) plus a choice of label fonts and canvas patterns.

Available in 13 languages. Works fully offline, and your graphs stay on your device.

PRO
Upgrade to PRO for unlimited nodes and saved graphs, advanced centrality and algorithms, SVG, HD and CSV export, transparent backgrounds, and premium themes, shapes, layouts and fonts.

Great for students, teachers, researchers, analysts, developers and anyone who thinks in connections.