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CSV DEDUPLICATE · DISTINCT

Remove Duplicate Rows from a CSV

Detect duplicates using all columns or selected columns and keep the first matching row. Your CSV never leaves your browser.

How to useSpecifications & limits

CSV processing stays in your browser

Your files are not uploaded to a server.

File selection

Choose 1 CSV file up to 50 MB. Its name and contents are never sent outside your browser.

Drag and drop a CSV file here

1 CSV file, up to 50 MB

How it works

Keep one row for each email address

Compare email addresses and keep only the first matching row.

Input example

2 columns · 2 rows
Input example
EmailName
alice@example.comAlice Smith
alice@example.comAlice Smith (updated)

Output example

2 columns · 1 row
Output example
EmailName
alice@example.comAlice Smith
The left table shows the input, and the right table shows the output.

Equivalent to DISTINCT. The number of excluded duplicate rows is also shown.