Free CSV Cleaner

Dedupe, trim, and tidy a CSV in seconds. Everything runs in your browser; your file is never uploaded.

Cleanup options Trim extra spaces in every cell (runs before dedupe) Remove empty rows Remove empty columns Remove duplicate rows

Match on: Keep: Treat duplicates as case-insensitive

Tidy headers (Title Case, no stray spaces)

Lowercase columns (e.g. emails): load a file to choose