Excel tools: find duplicates, combine sheets, and add columns
Find duplicate rows, combine Excel sheets, or match records and add columns. Process .xlsx files locally in your browser. No sign-up required.
Find duplicate rows
Find duplicates in one sheet, then choose which records to keep.
Combine sheets
Append rows from files and sheets while keeping source references.
Match and add columns
Add fields from a reference sheet and keep every main-table row.
What this tool supports
Use regular .xlsx tables with headers in the first row. Hidden rows are included; entirely blank rows are skipped. Saved formula results are used without recalculation. Output files are new workbooks and do not preserve source formulas or formatting.
.xlsx only, with headers in the first row. Up to 10 MiB per file and 30 MiB in total. Up to 10,000 rows and 50 columns per sheet, with 1 million input cells in total. Exports have a separate 1 million cell limit, including source references and issue sheets. Processing time depends on your device.
Duplicate checking, combining sheets, and adding columns also run locally. Downloads are new files; source files are unchanged. These tools do not save cloud files or task history.
Choose a tool for each task. To continue in another tool, download your results first and choose that file there.
Read the privacy detailsNeed to compare two sets of records?
Use the comparison workspace to match records and review additions, missing rows, and differing values.
Compare Excel files