BP Simulator is an online business process simulation software. Analysis of workforce sufficiency and availability of business process resources. Calculation of data for determining the reasonability of making changes to the workflow. Simple, visual, task-oriented modeling of business processes. Manual and automatic control over the process execution progress simulation. Calculation of simulation result data for subsequent use in Lean 6 Sigma. Automatic analysis of the results of imitation modeling of a workflow and generation of a list of suggested improvements. Only local or cloud (Google Drive, Dropbox and Yandex.Disc) resources are used for calculating and storing private data. Free for personal and commercial use. Support of offline operation. Installation is not required.