Tracer is graphical tool for visualization and diagnostics of MCMC output. It can read output files from MrBayes and BEAST.


You can download Tracer from here:

Using Tracer

The Divergence Dating tutorial is available describing how to use Tracer to analyse the output from BEAST.

Citing Tracer

The recommended citation for this program is:

  • Rambaut A, Drummond AJ (2007) Tracer v1.4, Available from

For more information and to download it, go to the Tracer web page.

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Bayesian evolutionary analysis by sampling trees