Remove Duplicate Rows from Excel & CSV Online
Instantly identify and delete duplicate rows in your spreadsheet. Choose exact or case-insensitive matching across all or specific columns, retaining the first unique entry.
Key Capabilities of Remove Duplicates
Retain First Matching Row
Keeps the original master record while safely eliminating subsequent repetitive rows.
Compare Specific Columns
Deduplicate based on primary keys (e.g., Email, Order ID) or across all columns combined.
Case-Insensitive Excel Mode
Matches "john@mail.com" and "John@Mail.com" seamlessly without complex helper columns.
Complete Duplicate Audit Log
See exactly which row numbers were matched and removed before saving the file.
How to Remove Duplicates in 3 Simple Steps
Drop Your Spreadsheet
Upload your CSV or Excel file containing repeated customer, product, or sales entries.
Inspect Duplicates
Review the detected duplicate rows and check which entries matched.
Export Deduplicated File
Download clean Excel or CSV with zero duplicate entries and preserved row order.
Frequently Asked Questions
Which row is kept when duplicates are found?
The first occurrence of the duplicate row is preserved, and all subsequent matching rows are removed.
Can I choose specific columns for duplicate detection?
Yes. In the cleaning rules panel, you can choose whether to compare all columns or select specific columns such as Email, Phone Number, or ID.
Does it support case-insensitive duplicate matching?
Yes. By default it uses case-insensitive matching (like Excel), so "ABC" and "abc" are recognized as duplicates.
Will removing duplicates delete my original file?
No. Your original file on your computer is completely untouched. You receive a newly generated cleaned file upon download.