Back to Free Tools
FREE TOOLS
CSV Duplicate Remover
Remove repeated CSV records while keeping the first matching row.
CSV
CSV
Browser only
Your input and output are processed in this browser. They are not uploaded for processing. No account is required.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Paste CSV text or choose a UTF-8 file; a chosen file takes precedence.
- Compare entire rows or provide 1-based key columns. Comparisons preserve case and whitespace.
- Select Process data, review the result, and download it. Use Reset to clear the working data.
Examples
name,score Alice,10 Bob,20
Limitations
5 MiB input; 50,000 data rows; 500 columns; 500,000 cells; 20 MiB output. First row is the header. Ragged rows are rejected.
Spreadsheet protection is on by default and visibly adds apostrophes to formula-like values. Turn it off for exact cell text, taking care with spreadsheet formula execution.
Related tools
No items found.