Excel Join
Upload two spreadsheets, pick the shared column, and download a merged .xlsx.
Works like a VLOOKUP: rows from File A are kept when a matching value is found in File B's chosen column, and File B's other columns are appended.
常见问题
What happens to rows with no match in the other file?
Rows from the first file are kept even if no matching row is found in the second, similar to a VLOOKUP that returns blank. The matched columns are just left empty for those rows rather than the row being dropped.
Does it work with multi-sheet workbooks?
It reads the first sheet of each uploaded .xlsx file. If your data lives on a different sheet, move or copy it to the first sheet before uploading.
Are my spreadsheets uploaded to a server?
No, this runs entirely in your browser using a JavaScript spreadsheet library to parse and merge the files. Nothing is uploaded, and the merged file is generated and downloaded locally.