CSV Cleaner

Clean messy exports before Excel, Google Sheets, a CRM, database, or analytics import. Files stay in this browser.

Drop CSV/TSV or choose a fileUp to 25 MB

Or paste delimited text

Input delimiter

Output delimiter

First row is a header Trim leading and trailing whitespace in every cell Remove completely empty rows Remove completely empty columns Remove exact duplicate rows after trimming Normalize headers to lower_snake_case

Quoted commas, quoted line breaks, Unicode, and escaped quotes are parsed with a CSV-aware parser instead of text replacement.

Frequently asked questions

How are duplicates detected?

Rows are compared after optional whitespace trimming. Every remaining cell must match exactly; fuzzy matching is not performed.

Are quoted commas and line breaks preserved?

Yes. The CSV parser understands quoted fields, escaped quotes, Unicode, and multiline values.

Is the CSV uploaded?

No. Parsing, cleaning, preview, and export happen locally.

CSV Cleaner

Continue your data workflow

Frequently asked questions