All about TREE Files

The TREE file type is primarily associated with ChessBase.

TREE	File extension: TREE
	File type:	data file

What is a TREE file

TREE files mostly belong to ChessBase. TREE files store data in a tree-like, hierarchical structure. They do not represent one single format but a range of formats where the data is arranged in branches from a root. This means that the file content is organized in a series of parent-child relationships, which different applications use to represent complex datasets.
Useful examples include:

Chess game data: These files hold game tree notation used to record moves and alternatives in chess. ChessBase, for instance, uses TREE files. Check more details at ChessBase.

Phylogenetic trees: In biology, they map evolutionary relationships. Applications like NEXUS, RAxML, and phylip produce such files. Viewing tools such as FigTree can display these trees; visit this site for more info.

Software project files: In environments like Eclipse or in outliner tools that use JSON, TREE files capture project structures and hierarchical data. See more at Eclipse.

Diagram and parse trees: They also store decision trees (as used by Graphviz, available at Graphviz) and syntax trees for language analysis (e.g. by Stanford Parser; details at Stanford Parser).

Other uses: Some TREE files store 3D point cloud data (Terrain Sculptor), YANG data models for network configurations, or channel lists for DVB viewers.

Purpose: These files are designed to encode data in a branching format, making it easy for software to parse relationships between items.
Functionality: The internal format may be plain text, JSON, or compressed (as with GZIP). This allows both machine processing and sometimes manual inspection using a simple text editor.
FilExt.com tip: To open and view an TREE file, you should use the application that created it. If unsure, try opening the file in a text editor to inspect its structure, or check any accompanying documentation to identify its source.

How do you open TREE files?

You need a suitable software like ChessBase to open a TREE file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your TREE file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a TREE file directly in the browser:. Just drag the file onto this browser window and drop it.

Online TREE Text Viewer

Choose your .tree file to analyze

or drag and drop it here

Online File Viewer

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TREE file format:

The file format determines how the data is stored in the file. A file format is determined by the file extension and signature, so JPEG images have the extension .jpg and the first bytes in the file are ÿØÿ. File extension, signature and file format must match; otherwise errors will occur when the file is opened. If there are problems opening a file, you must first determine the file format used. Our analysis of the TREE files produces the following result:

Files with the TREE extension are quite widely used. This file type has no uniform or dominant file format. However, the following two file formats are common:

• 10% of all TREE files use the same file format, which have the signature 13 37 00 00 00 01 C0 D3 13 37. These files are binary files, so they do not contain text, but only cryptic characters. The average file size is 690 KB with most files being between 88 KB and 2 MB in size. The file type is very recent. Such TREE files store data about white and black, and usually contain person-related data.
• 6% of all TREE files start with the bytes #NEXUS crucial for this file format. These files are text files and can therefore be read using a text editor. The files are on average 63 KB in size and range from 200 bytes to 350 KB. Several words can almost always be found in the files, e.g. #NEXUS, begin taxa;, dimensions ntax and taxlabels. Files like these have the following tags: data.

The remaining 84% of all TREE files are different files with different signatures, often e.g. JSON, ROOT, ftp, digraph, module and program. These files are often connected to gtdbtk, classify, exported, news, raxml, newick, silva or ncov. You can get all the details of your TREE file by dragging it onto this page or by clicking the button "Choose your .tree file to analyze" above.