Create RDF data by editing formatted Excel spreadsheets. We use this at Sparna to populate knowledge graphs with RDF instances, edit SKOS vocabularies, SHACL specifications, even OWL ontologies.
Complete documentation of the expected Excel sheets format can be found at https://xls2rdf.sparna.fr/rest/doc.html.
The Excel to RDF conversion service is accessible as an REST at http://xls2rdf.sparna.fr/rest/convert. It can work with online publicly accessible Google spreadsheets.
An upload form where you can upload your Excel file and download the result of the conversion is accessible in the SKOS Play application (for which this converter was historically designed) at https://skos-play.sparna.fr/play/convert
You can run the conversion from the command-line. See https://github.com/sparna-git/xls2rdf/wiki/Command-line-Excel-to-RDF-conversion
This is available as a Java jar library that can be integrated in your app.
The upload form at https://skos-play.sparna.fr/play/convert contains downloable examples of Excel spreasheets.
@EmidioStani has contributed shacl2spreadsheet, an Excel template generator based on a SHACL Application Profile definition
See also https://github.com/tfrancart/rdf2xls which is the inverse tool : recreate Excel files from RDF data, based on a SHACL specification of the Excel file structure.