In parallel to the conversion of data, ChemConverter is also used for the extraction and matching of metadata to pre-defined metadata schemes. ChemConverter can be taught to detect metadata according to diverse rules, using the same profile approach used for the conversion of data. While for data, the JCAMP-DX format (as an available standard) is used, there are currently only a few comprehensive schemes available for metadata and, as far as we know, there is no metadata standard available for cyclic voltammetry. This results in the need to define a metadata scheme that can be used as a common target output for metadata captured from different devices. Recently, the American Chemical Society (ACS) released new guidelines for the description of electrochemical data and, therefore, as part of it, also for voltammetry experiments. In our approach, the required metadata in this policy was combined with the input gained from different scientific groups as representatives of the cyclic voltammetry user community, yielding a suggestion for a set of metadata that can be used to define a target metadata schema (see details of the metadata scheme in the SI). Following the concept of ChemConverter for the conversion of data, a profile for metadata is defined, with an example set of metadata, for each device the first time it is introduced. The profile is defined by the mapping of input metadata to the target metadata scheme that was defined by the community representatives, and the mapping is stored in the profile. These device specific profiles -which have to be defined just once per device -enable the matching of metadata to the target metadata scheme for further files of the same type. Here again, identifiers that need to be part of all files are used as indicators for the recognition and application of a certain profile (Figure ). For cyclic voltammetry, we were successful in the mapping of metadata for data coming from Gamry and PalmSens and the profiles are available for further reuse. For data coming from Metrohm, the extraction and matching of metadata from the available text file was not possible as described for Gamry and PalmSens yet . To gain some of the most important metadata, such as the scan rate, ChemConverter runs a few routines to calculate metadata automatically from the data provided -this allows it to match the most important metadata. After applying the profiles' mapping for Gamry, PalmSens and Metrohm, the extracted and assigned metadata are then added to the JCAMP-DX data file and are additionally stored as a JSON output file.