First row wins
Rows are compared by the selected exact key, and the first occurrence stays in the output.
PRIVATE, LOCAL, USEFUL
Remove duplicate CSV rows without uploading the file.
Choose a key column, keep the first occurrence, and download a cleaned CSV. Everything runs in this browser tab; the file is never sent to a server.
CSV cleanup
Select a CSV file
The tool accepts normal quoted CSV fields and embedded commas/newlines.
No file selected.
No upload
Parsing and cleanup happen locally with browser JavaScript. No network request is made.
Need more?
For recurring feeds, validation rules, or API delivery, request a bounded automation slice.
Turn a one-off cleanup into a reliable workflow.
Fixed-scope Python/CSV automation with tests, a README, and explicit acceptance checks.