Cluster tree generator

Cluster tree

Arrange a parent-child hierarchy in a compact dendrogram to emphasize related branches and depth. Create a private, publication-ready cluster tree directly in your browser without transmitting sensitive rows off-device. Data is processed locally on your hardware with zero server uploads, enabling instant export to SVG, PNG, and Excel data.

Hierarchyhierarchydendrogramrelationships

Edit the data, then export.

Everything runs in your browser. Your data is not uploaded.

Data

Paste tab-separated data from Excel or edit the cells directly.

Paste or import table data

Paste a header row, or choose a local CSV/TSV file. Files are read in this browser and capped at 500 rows.

Choose CSV/TSV

Appearance

Chart title

Palette

Width Data labels Gridlines Axes LegendBackground

Preview

Sample preview of the example data. The live chart takes over as soon as you start working.

SVG, PNG, and Excel exports are generated locally in this browser. PowerPoint export is temporarily unavailable while its dependency path is reviewed for a high-severity image parser advisory.

Hierarchical Structure & Parent-Child Nesting

A cluster tree, often called a dendrogram, visualizes hierarchical data by organizing parent-child relationships into a branching structure where all terminal leaf nodes are forced to align at the same maximum depth along the outermost baseline. This strict leaf alignment makes it easier to compare the depth of nesting and track lineage across deeply structured trees, contrasting with standard node-link trees where leaves can terminate at any depth. Trendalyzer renders cluster trees securely and locally on your machine, ensuring your hierarchical datasets remain completely private with no data uploaded to external servers.

Tree Data Representation & Branching

Format input columns for cluster tree with explicit headers and numerical measurements. Verify that rows represent discrete nodes or geographic units without unformatted symbol artifacts.

Sample Node Hierarchy

| Node ID | Parent ID | Distance |

Ensure sufficient visual distinction for cluster tree marks across standard and high-contrast viewports.
Align text labels horizontally whenever possible to improve cognitive readability for cluster tree elements.
Double-check scale boundaries and zero-anchors before exporting cluster tree presentation artwork.

Data shape: Node id, parent id, and optional numeric value columns
Exports: SVG, PNG, and Excel data; PowerPoint export is temporarily unavailable pending dependency review.

How it works

You edit a table in this page. The renderer draws an SVG from those rows in your browser, then you can download SVG, PNG, or Excel data. The table is not uploaded to any external processing server.

Frequently asked questions

What does the branch length in a dendrogram indicate?

Branch length represents mathematical distance or dissimilarity between clustered groups.

Hierarchical bar chartCombine parent-child indentation with bars so readers can compare magnitude across a hierarchy.Open Icicle chartReveal a hierarchy as nested horizontal bands whose area represents leaf-level contribution.Open Indented treePresent parent-child relationships as an indented outline that is easy to scan and export.Open Nested treemapCompare hierarchical composition with nested rectangles sized by leaf-level contribution.Open Radial cluster treeShow a hierarchy as a circular dendrogram when branch structure must fit in a compact footprint.Open Radial tidy treeDisplay hierarchical connections radiating from a center root node.Open

Reviewed 16 August 2026.