ReconNimble tool

Find duplicates in Excel and CSV data

Duplicate records create billing, asset ownership and license-audit confusion. ReconNimble groups repeated keys and prepares review-ready duplicate tabs.

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Use cases

Repeated employee codes
Duplicate asset serials
Repeated email accounts or invoice numbers

How it works

Upload datasets
Select duplicate key
Run reconciliation
Review duplicate groups and recommended action

Formula logic

ReconNimble explains the matching logic in plain English using equivalents such as VLOOKUP, XLOOKUP, IFERROR, COUNTIF, FILTER, UNIQUE, TRIM and CLEAN.

Upload files

FAQ

Questions about Excel Duplicate Finder

Can duplicates be found in both files?

Yes. Duplicate groups are shown for source and target data.

Can I use fuzzy names?

Yes, fuzzy name matching is available as an optional rule for messy name data.

Related tools

Continue with another reconciliation utility or upload your files directly.

Find missing records Find duplicates VLOOKUP alternative Start now