CSV Cleaner
Clean spreadsheet exports and datasets locally in your browser.
Local developer data tool
Paste CSV and clean safe issues.
Trim cells, remove blank rows, normalize line endings, and remove duplicate identical rows without uploading your data.
Rows: 0 · Columns: 0 · Input size: 0 B
When should you clean CSV files?
CSV exports often include extra spaces, blank rows, inconsistent line endings, or repeated rows. Cleaning those safe issues makes datasets easier to import, compare, and review.
This tool avoids destructive transformations. It preserves column order and values except for trimming whitespace, removing blank rows, and deleting exact duplicate rows.
Frequently Asked Questions
Is this CSV Cleaner free?
Yes. You can paste, clean, preview, copy, and download CSV without signup.
Are CSV files uploaded?
No. CSV files are read and cleaned locally in your browser.
What cleaning rules are applied?
The tool trims cell whitespace, removes blank rows, normalizes line endings, and removes duplicate identical rows.
Does it change column order?
No. Column order is preserved. The tool avoids destructive reshaping.
What happens with malformed CSV?
The tool shows a friendly warning and preserves your original input.
Privacy Policy
We do not collect, store, upload, or transmit CSV data. Local file selection reads the file only in your browser.
Terms of Use
ConvertUnlimited is provided as is. Review cleaned CSV before importing it into production systems.