Note: See the details on iTOL access modes and subscriptions

Current changelog: version 6.9



Organize your trees into workspaces and projects, and access them from any browser. Simply drag and drop multiple tree files onto a project to upload them all at once.



19 dataset types. Full control over branch colors, widths and styles. Individually adjustable label fonts, sizes and styles. Check our gallery of user created trees.

Exporting trees


Create high quality tree figures for your publications. Direct What-You-See-Is-What-You-Get export of what is displayed on the screen. Export into various vector or bitmap formats.

Various display modes. Support for large trees.

iTOL can visualize trees with 50'000 or more leaves. With advanced search capabilities and display of unrooted, circular and regular cladograms or phylograms, exploring and navigating trees of any size is simple.

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Visualize support values. Explore clade distances.

Branch support values and other metadata can be visualized as various shapes with adjustable colors and sizes or as text labels. Alternatively, branch colors or widths can be linked to the underlying data values.

Trees with branch length information can have an internal scale with adjustable levels and colors, allowing easy estimation of distances between various clades.

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Simple management of all your trees. Share your work.

Create unlimited workspaces and projects, and organize your trees using simple drag and drop. Customize the project displays individually or across your whole account.

Projects can be shared easily, providing public or private access to your trees.

Create an account Data sharing

iTOL account