The Excel equivalent of mail merge: filling a ready XLSX template with data
aVadim
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27.08.2026
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Word has mail merge: you take a template with fields and drop the data in. Excel appears to have nothing of the sort out of the box — so developers start assembling documents cell by cell in code. In fact, substituting values into a ready XLSX takes two lines: placeholders, the fill/replace difference, and the usual traps.