The comparison and validation of MANET (mobile ad-hoc network) simulators is a difficult and little covered research area because the internal of these tools are complex. The lack of work and visibility in the domain often arouse users' negative feelings about simulation. In this article, we propose a framework dedicated to the validation, the comprehension and the analysis of MANET simulators. The system can process trace files generated by different versions of a simulator or different simulators. The solution is based on software instrumentation and the use of a standard trace format. It proposes three types of analysis: the representation of the network activity with timelines, the plotting of network metrics and the validation against the 802.11 standard specifications.