Since the 1990s, incumbent-led autocratization in democracies is increasingly common. However, there is surprisingly little systematic and comparative research into the actions would-be autocrats actually take when they undermine democracy. We analyse the wealth of in-depth case studies of all cases of incumbent-led autocratization in democracies from 1990 until 2023 to develop such an overview of autocratic actions inductively. This empirically based would-be autocrats’ toolkit encompasses over 400 unique autocratic actions which we classify into seven overarching modes of autocratization: evasion, manipulation, infiltration, duplication, restriction, prohibition, and delegitimation. Would-be autocrats selectively use these different modes in varying arenas of democracy to gradually erode democracy. The toolkit provides a starting point to more systematically study autocratization within and across different cases, enabling the identification of sequencing and diffusion patterns, and helping generate better understanding of when autocratization is successful.