Does Tablyra upload files?
No. Your spreadsheet stays in the desktop app. You choose the small samples used to create a plan before anything is sent.
Open an Excel or CSV file, tell Tablyra what to clean, combine, or check, edit the proposed steps, and preview the finished result before creating a new file.

No. Your spreadsheet stays in the desktop app. You choose the small samples used to create a plan before anything is sent.
Yes. Choose the two files, the columns that identify the same row, what to do with duplicates, and which result columns to keep.
Yes. Tablyra shows an editable list of steps and a before-and-after preview before you save anything.
Not by default. Tablyra saves a new file unless you explicitly choose to update the original; it creates and verifies a backup first.