CSV Cleaner help

Clean up a CSV without a spreadsheet. The file is read on your device and the cleaned copy is built there too.

Operations

• Trim whitespace from every cell, and optionally collapse repeated spaces.
• Drop blank rows where every cell is empty, and blank columns that are empty in every data row.
• Remove duplicate rows, optionally ignoring case.
• Fill down copies the value above into a blank cell, per column.
• Find and replace, plain text or a regular expression, across all columns.
• Header case reformats just the first row to lowercase, Title Case, snake_case, or kebab-case.

Steps

1. Drop a CSV. The delimiter is auto-detected.
2. Tick the operations you want; the preview and the row and column counts update live.
3. Download the cleaned CSV.

Notes

• Operations run in the order listed above.
• The preview shows the first 50 rows; the download has all of them.
• Nothing is uploaded.

Everything runs in your browser. Nothing you enter or drop is uploaded.