This thesis specify, design and develop graphial viewer and editor of ELF binary files. The goal of this thesis is to provide easier manipulation with ELF files, although they were corrupted by wrong editing. The final software must be multiplatform, so Qt library is used for the implementation of its graphical user interface. For manipulation with ELF files is uses elf.h library. The application is implemented in C++. The realized tool can be used on both Linux operation system and Microsoft Windows.