IOHexperimenter is the benchmarking platform for Iterative Optimization Heuristics (IOHs). IOHexperimenter provides: - A framework for straightforward benchmarking of any iterative optimization heuristic - A suite consisting of 23 pre-made Pseudo-Boolean benchmarking function, with easily accessible methods for adding custom functions and suites - Logging methods to effortlessly store benchmarking data in a format compatible with IOHanalyzer, with future support for additional data logging options - (Soon to come:) A framework which significantly simplifies algorithm design