sbmlutils is a collection of python utilities for working with SBML models implemented on top of libsbml with source code available from https://github.com/matthiaskoenig/sbmlutilsFeatures include among othersmodel creation, manipulation and annotationvalidation and unit consistency of modelshierarchical models (comp), constraint based models (fbc) and uncertainties (distrib)human readable reports of SBML models at https://sbml4humans.deconverters (ODE systems, XPP, antimony, COPASI)The documentation is available at https://matthiaskoenig.github.io/sbmlutilsIf you have any questions or issues please open an issueFundingMatthias König is supported by the Federal Ministry of Education and Research (BMBF, Germany) within the research network Systems Medicine of the Liver (LiSyM, grant number 031L0054) and by the German Research Foundation (DFG) within the Research Unit Programme FOR 5151 QuaLiPerF (Quantifying Liver Perfusion-Function Relationship in Complex Resection - A Systems Medicine Approach)" by grant number 436883643 and by grant number 465194077 (Priority Programme SPP 2311, Subproject SimLivA). SBML4Humans was funded as part of Google Summer of Code 2021. Matthias König has received funds from the EOSCsecretariat.eu which has received funding from the European Union's Horizon Programme call H2020-INFRAEOSC-05-2018-2019, grant Agreement number 831644.