We use the .slk file format (SYLK - SYmbolic LinK). The files open fine in Excel and LibreOffice Calc, but not in OnlyOffice. It treats it as a CSV file and the layout is not correct.
Do you think it will be possible to add support for this format?
Unfortunately, SYLK (.slk) is not supported in ONLYOFFICE at the moment and is not on our roadmap, however if there is clear demand from the community (votes and additional use-cases in this topic), we’ll consider the request.
As a workaround, please convert the file to XLSX before opening it in ONLYOFFICE.