Converting .xlt files directly to .accda format.
Converting Microsoft Excel Spreadsheet Templates directly to Access Add-in Files (.xlt to .accda conversion) is not possible, and doesn't make much sense, since both file types have completely different functions and purpose.
We are not aware of any available file conversion utility capable of such a conversion.
In a word, direct xlt to accda conversion is not possible.
So don't expect any so-called xlt to accda converter or xlt to accda free online conversion tool available.