Remove Excel Duplicates FAQ — ComTools
Preview-based duplicate removal for XLSX/CSV on ComTools: columns, keep first/last, export options.
How to use
- Open — https://comtools.cn/excel-remove-duplicates
- Choose keys — Pick columns / full row
- Preview & export — Review groups then download
FAQ
How do I remove duplicates online?
Open /excel-remove-duplicates, upload or paste, choose columns, preview groups, then export.
One column vs multiple?
Match on one key column or several columns; full-row compare is also available.
Keep first or last?
Choose keep-first or keep-last before deleting duplicates.
Export options?
Export cleaned rows, marked duplicates, or unique values only.
Is the file stored?
Temporary server processing only; not stored permanently.
More guides?
See /excel-remove-duplicates-by-column and related satellite pages.