Bulk CSV Cleaner
Clean up messy spreadsheets fast: remove duplicate rows, trim stray whitespace, normalize email addresses and drop empty rows — all locally in your browser.
Input CSV
Delimiter
Cleaning options
Cleaned output
Your cleaned CSV will appear here.
Frequently asked questions
Is the CSV cleaner free?
Yes — free to use with no sign-up and no row limits.
Is my CSV file uploaded anywhere?
No. Your file is processed entirely in your browser and nothing is ever sent to a server.
What does it clean?
It removes duplicate rows, trims leading and trailing whitespace, normalizes email addresses to lowercase, and deletes empty rows — each option can be toggled on or off.
Does it handle quoted values with commas?
Yes. The parser correctly handles quoted fields that contain commas, quotes or line breaks, so values like "Smith, Jr." stay intact.
Which delimiters are supported?
Comma, semicolon and tab, with automatic delimiter detection that you can override.