Tellsheet, Excel’s reversible toolbox

Field notes

The add-in turns common spreadsheet cleanup into selectable workflows: users choose columns and options, inspect a before-and-after result, and apply or cancel the operation. Listed operations include combining sheets or files with source tracking, matching two lists by key, converting several text-date formats, and unpivoting monthly columns. The optional command bar accepts instructions such as “remove the leading zeros in A”; the page says it uses the buyer’s own Anthropic API key rather than sending worksheet cells.