Our CSV cleaner removes duplicate rows, trims whitespace from all cells, transforms text case (lowercase, UPPERCASE, Title Case), removes empty rows and columns, and standardizes formatting. All operations preserve your data integrity while improving consistency.
Clean CSV Data Instantly — Free Tool
Remove duplicates, fix formatting, and standardize your CSV files
Fast, free, and private — no file storage on our servers, works entirely on your device
Free tools supported by advertisements
Upload CSV File or Paste Data
Drop CSV file here or click to browse
⚠️ Files larger than 10MB may cause performance issues
Supports comma, semicolon, and tab-separated values
Related Data Tools
Frequently Asked Questions
We recommend files under 10MB for optimal performance. Larger files may cause slower processing since all CSV data cleaning happens locally in your browser. For very large datasets, consider splitting them into smaller chunks.
All CSV data processing happens entirely in your browser. Your data never leaves your device and is not stored on our servers or in any database. No uploads, no server processing, no file storage.