The slow return of in-person conferences brings with it the need to print conference posters, but not everyone will have ready access to a poster printer. Plakativ is software intended to generate a multi-page PDF that can be printed on standard sized paper and pasted together to make a poster. Users can create their poster in three ways: 1) a specified final size, 2) a given magnification of an input file, or 3) the biggest possible poster that can be generated with a specified number of sheets of paper. Plakative includes both an interactive GUI and a batch mode command-line utility. An animated demonstration of the GUI features is presented on the Plakativ landing page. Plakativ is written in Python and requires a Python installation to use. It can be installed via `pip` and has been tested on Windows, macOS, and Linux.