Interface to the 'JWSACruncher' of 'JDemetra+' R package rjwsacruncher version 0.2.3 'JDemetra+' (<https://github.com/jdemetra/jdemetra-app>) is the seasonal adjustment software officially recommended to the members of the European Statistical System and the European System of Central Banks. Seasonal adjustment models performed with 'JDemetra+' can be stored into workspaces. 'JWSACruncher' (<https://github.com/jdemetra/jwsacruncher/releases> for v2 and <https://github.com/jdemetra/jdplus-main/releases> for v3) is a console tool that re-estimates all the multi-processing defined in a workspace and to export the result. 'rjwsacruncher' allows to launch easily the 'JWSACruncher'. Software Imports: XML Suggests: knitr, rmarkdown Alain Quartier-la-Tente <alain.quartier@yahoo.fr> Comprehensive R Archive Network (CRAN) Alain Quartier-la-Tente [aut, cre] (ORCID: <https://orcid.org/0000-0001-7890-3857>), Institut national de la statistique et des études économiques [cph] GPL-3 2026-03-02 application/tgz https://CRAN.R-project.org/package=rjwsacruncher doi:10.32614/CRAN.package.rjwsacruncher