Csv Dedupe Rows Tool
Remove duplicate CSV rows by selected key column and preview the remaining rows.
What the Csv Dedupe Rows Tool does
Remove duplicate CSV rows by selected key column and preview the remaining rows. A signup export can keep one row per email address before import Adjust the controls and the preview updates immediately, so you can dial in exactly what you want and copy the result straight into your project — no build step and no account.
One thing to keep in mind: Spot-check quoted values and delimiters in messy CSV files.
Private and in your browser
Everything runs locally in your browser. Your input is never uploaded, so the tool stays fast and works offline, and the copy and download buttons always use the current result shown in the output panel.
Frequently Asked Questions
What does the Csv Dedupe Rows Tool do?
Remove duplicate CSV rows by selected key column and preview the remaining rows. A signup export can keep one row per email address before import.
What should I keep in mind?
Spot-check quoted values and delimiters in messy CSV files
Does it upload my input?
No. The Csv Dedupe Rows Tool runs entirely in your browser — your input is never uploaded, and it keeps working offline once the page has loaded.
Practical utilities for front-end design and implementation work.