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by ssss11 866 days ago
Is VBA still a thing in excel? You could have a function per client and just run the correct one to format it.

Or using python or your choice of language to read .csv files and modify..

It may be overkill but n8n is a process automation tool (open source, self hosted) - give it input, run an action, get output. I’m sure you could do it in that.