Free Dendrogram Maker — Show Hierarchies

See it work

Dendrogram examples.

Same tool, four requests. Every drawing below is a real render.

What you type

Create a gene expression clustering dendrogram for BRCA1, BRCA2 and RAD51 as a DNA repair cluster, and EGFR, ERBB2 and MYC as a growth signalling cluster, with a cluster-distance scale and a cut at 3.

Then tryAdd a TP53 sample.Change the cut to 2.5.

Phylogenetic tree: Gene expression clusters

Phylogenetic tree · Newick + NHX extensions · schematex-phylo

Rather start from a finished drawing? Browse 17 phylogenetic tree templates →

The drawing

What a dendrogram is.

A dendrogram is a tree diagram that shows how items join into progressively larger groups. The leaves are individual items, while each internal branch marks the point where two clusters or lineages merge.

For hierarchical clustering, the height of a merge represents the distance or dissimilarity at which groups were joined. A dendrogram can also display taxonomic or phylogenetic hierarchies when the focus is the nesting of groups.

Standard: Newick + NHX extensions
Engine: schematex-phylo
Editable: Double-click text, drag nodes
Export: SVG · PNG · PDF

Who uses it

Who uses dendrograms.

Bioinformatics teams

Group samples, genes or species by similarity and inspect the major clusters before further analysis.

Data analysts

Explain hierarchical segments and the order in which related observations join into clusters.

Students and teachers

Show nested taxonomic groups in a compact diagram for a lesson or report.

How it works

How to make a dendrogram in three steps.

Describe it

One paragraph is enough to start.

“Create a gene expression clustering dendrogram for BRCA1, BRCA2 and RAD51 as a DNA repair cluster, and EGFR, ERBB2 and MYC as a growth signalling cluster, with a cluster-distance scale and a cut at 3.”

See the drawing

Drawn by the right engine.

Say what changes

Every edit keeps a version.

Add a TP53 sample.

V2 · DRAWN FROM V1, NOTHING RETYPED

FAQ

Common questions

What is a dendrogram?

A dendrogram is a tree diagram that shows hierarchical relationships. Leaves are individual items, and internal branches show when clusters or groups merge.

What does the height of a dendrogram mean?

In a hierarchical clustering dendrogram, merge height represents the distance or dissimilarity at which clusters join. A high merge means the groups were less similar than groups that merge lower down.

What data is a dendrogram used for?

Dendrograms are used for hierarchical clustering in bioinformatics, machine learning, market research and linguistics. They can also show taxonomic and phylogenetic relationships.

How is a dendrogram different from a phylogenetic tree?

A dendrogram is a general diagram for nested groups and clustering distance. A phylogenetic tree specifically represents an evolutionary hypothesis, often using branch lengths for genetic change or time.

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