Meerkat Duplicate Remover

Remove duplicate rows from spreadsheets and CSV files online — no signup, no upload, no limits. Drop your file and instantly see how many duplicates were found. Download the cleaned data as CSV or Excel. Each row is compared cell-by-cell, keeping the first occurrence and removing subsequent duplicates. Everything runs locally in your browser.

How does it detect duplicate rows?

Each row is serialized to a string and compared. Two rows are duplicates if all their cell values match exactly. The first occurrence is kept; subsequent duplicates are removed.

Can I remove duplicates from Excel files?

Yes. Drop any .xlsx, .xls, or .csv file. For Excel files with multiple sheets, you can select which sheet to deduplicate.

Can I see which rows were removed?

Yes. After deduplication, you see a summary showing the original row count, how many duplicates were found, and the final unique row count.

Is my data safe?

Yes. Everything runs in your browser — no upload, no server, no tracking. Your data never leaves your device.