Remove Duplicate CSV Rows, free in your browser

Keep the first occurrence of each CSV row and remove later rows with the same cell values.

How to remove duplicate CSV rows

1. Choose a CSV or TSV file.
2. Set the header and comparison options.
3. Remove duplicate rows and download the result.

Limits & good to know

• CSV and TSV files up to 50 MB are processed on your device.
• Comparison uses the entire row; optionally ignore letter case and surrounding spaces.
• The first row is treated as column names by default.

Frequently asked questions

Are my files uploaded to a server?

Your files are processed on your device, not uploaded to our servers. Your file and edits are saved in this browser for recovery, and previous documents remain in Saved drafts when you open another file. Use Saved drafts to resume or delete individual copies, or clear this site’s browser data to remove all copies. Browser storage can be cleared or become unavailable; download important work.

Which duplicate is kept?

The first matching row remains in its original position.

Is this really free, or free "until you hit a limit"?

Really free. Unlike most "free" PDF sites there is no task-per-day cap, no locked Pro features, no watermark stamped on your file, and no payment step before download. Every tool is the full tool.