Free CSV & Sales Data Cleaner
Clean, deduplicate, and format messy e-commerce spreadsheets and sales reports in seconds. 100% private, client-side, and no file uploads to any server.
Input Spreadsheet / CSV
Cleaned Output Table
| No data loaded yet |
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| Upload a CSV or click 'Load Sample' to begin |
Frequently Asked Questions About Data Cleaning
How client-side CSV processing protects your sensitive customer records
Are my customer emails or financial rows uploaded anywhere?
No. This tool operates 100% locally inside your web browser using HTML5 File APIs. Zero bytes are uploaded or sent across any network, ensuring total confidentiality and GDPR compliance.
What formats are supported?
You can upload standard comma-separated (.csv), tab-separated (.tsv), or copy-pasted spreadsheet rows directly from Excel or Google Sheets.
How does the name-splitting feature work?
If your CSV has a column containing full names (e.g. "Johnathan Smith"), checking the "Split Full Names" box automatically separates it into individual First Name and Last Name columns for clean CRM imports.
Can this handle large files with thousands of rows?
Yes. The client-side parser uses fast in-memory array transformations capable of processing 10,000+ rows in less than a second.
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View Spreadsheet Templates →