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z-Tree - Zurich Toolbox for Readymade Economic Experiments

Documentation and Support


The manual consists of two parts, a tutorial and a reference manual.

User manual for z-Tree version 5 (PDF)

User manual for z-Tree version 4 (PDF)

Release notes

Extended release notes for version 5


Get started with z-Tree

Take the guided tour of a public goods experiment in the tutorial and discover the basic elements of z-Tree programming.



Manual for z-Tree version 3.5 in Thai (PDF)

Thanks to the Center for Behavioral and Experimental Economics, Chulalongkorn University, Thailand


Tutorial for z-Tree version 2.1 in Japanese (PDF)

Thanks to Yoshio Iida and Atsushi Iwasaki!

Mailing List

The mailing list is the heart of the z-Tree community. If you like to join this list, please refer to one of the following instructions:

When you choose the first method you will have the advantage of having your own SYMPA account. Therefore, you can change your password, email address, and access the archive of the mailing list.

You can unsubscribe using the webinterface or by sending an email to with the subject "unsubscribe ztree".

If you have questions or problems about using SYMPA, please refer to the online help.

Further Support

Please address problems first to the mailing list. It allows all users to benefit from the solutions.

If you find a bug, please report the issue to Please describe what you expected to happen and what actually happened. A sample treatment helps, the smaller the better. We will review this report and contact you via email if any follow-up is required.