Graphonline
Graph Online creates graphs and applies algorithms for shortest paths, adjacency matrices, and minimum spanning trees.
About Graphonline
Graphonline is a browser-based workspace for drawing graphs and running classic graph algorithms. Users can add vertices and weighted or unweighted edges, build directed or undirected graphs, and then apply algorithms such as Dijkstra's and Bellman–Ford shortest paths, Floyd–Warshall, minimum spanning tree, maximum flow, breadth-first and depth-first search, connected components, graph coloring, radius and diameter, and Eulerian or Hamiltonian path and cycle checks. A beta option checks whether two graphs are isomorphic and searches for isomorphic subgraphs.
Results can be reviewed through adjacency, incidence and distance matrices, and graphs can be saved as images, SVG or exported and imported as files. A Help page includes a tutorial video. Some algorithms report that a graph is too large for them and state the maximum supported number of vertices and edges, multigraphs are not supported by all algorithms, and the isomorphism check is marked beta. The site notes when a browser is not supported and offers an email address for problems and feedback.
Key features
- Draw directed or undirected graphs with weighted or unweighted edges
- Find shortest paths with Dijkstra's and Bellman–Ford algorithms
- Compute adjacency, incidence and distance matrices
- Search minimum spanning tree, components, Eulerian and Hamiltonian paths
- Check graph isomorphism and search isomorphic subgraphs (beta)
- Export graphs as images, SVG, or import and export files
Best for: Students, teachers and developers who need to draw graphs and apply standard graph algorithms without installing software.
Good for
- Covers a broad set of classic graph algorithms in one browser workspace
- Graphs can be exported as images, SVG or files and imported again
- Help page provides a tutorial video for getting started
Watch out for
- Some algorithms reject graphs that exceed their supported vertex and edge limits
- Multigraphs are not supported by all algorithms
- The isomorphism check is labelled beta
Graphonline at a glance
- Website
- graphonline.top/en
- Category
- Design & Creative › Charts & Data Visualization
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Graphonline FAQ
Can I save or export a graph?
Yes. The site offers saving a graph image, a workspace screenshot, a printed black-and-white image, SVG output, and export to and import from a file.
Are there limits on graph size?
Some algorithms report that the graph is too large and state the maximum number of vertices and edges they support.
Can I submit my own algorithm?
You can paste an algorithm into the workspace and run it; submitted algorithms are sent for review and added to the site if successful.
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