Messy spreadsheet rows
Remove blank rows and empty columns, trim extra spaces, and keep a cleaner rectangular CSV shape for spreadsheet import.
Upload CSV
Drop a CSV file here
Upload is the default. Paste mode is below.
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CSV stays local. No upload. No account.
Clean Options
Turn on Excel UTF-8 BOM if accents, currency symbols, or non-English characters open wrong in Excel.
Paste CSV instead
0Raw rows
0Clean rows
0Columns
0Rows removed
0Cells changed
Preview
Clean CSV Files Online Without Uploading Data
Universal CSV Cleaner is a private CSV cleaner and CSV formatter for messy spreadsheet exports. It runs locally in your browser, so order exports, inventory reports, payment CSV files, marketplace downloads, and customer rows stay on your device.
Use it when a CSV file opens badly in Excel or Google Sheets, has duplicate headers, contains empty columns, mixes date formats, includes currency symbols, or needs a safer import-ready format.
What This Free CSV Cleaner Fixes
Bad or duplicate headers
Turn headers like " Order Date " and "Sale Price" into simple, unique field names such as order_date and sale_price_2.
Safer CSV exports
Protect values that can be interpreted as spreadsheet formulas, then export a clean CSV for Excel, Google Sheets, Numbers, Airtable, or database tools.
How to Clean a CSV File
- Drop a CSV file into the upload area, choose a CSV file, or paste CSV text.
- Keep the default clean options on, or turn off anything you want to preserve.
- Check the preview table and cleaning stats before export.
- Download the cleaned CSV and import it into your spreadsheet or database tool.
Before and After CSV Cleanup Example
This is the kind of cleanup the tool is built for: whitespace, duplicate headers, money formatting, blank columns, and spreadsheet formula safety.
| Messy CSV value | Clean CSV value |
|---|---|
| Order Date | order_date |
| "$1,240.50" | 1240.50 |
| 05/08/2026 | 2026-05-08 |
| =SUM(A1:A2) | '=SUM(A1:A2) |
The leading apostrophe before =SUM(A1:A2) is intentional. It prevents Excel, Google Sheets, and other spreadsheet tools from running the value as a formula when the CSV is opened.
Best For Common CSV Export Problems
- Excel CSV cleanup before formulas, pivot tables, or reports.
- Google Sheets import cleanup for ecommerce, marketplace, inventory, and order data.
- CSV formatter workflows before Airtable, Notion, database, CRM, or accounting imports.
- Private cleanup of sensitive business CSV files when you do not want to upload data to a server.
CSV Cleaner FAQ
Does this CSV cleaner upload my file?
No. The cleaner uses browser JavaScript and does not send CSV contents to a server. It is designed for private local cleanup.
Is this CSV cleaner free?
Yes. The public CSV cleaner page is free to use.
Can it clean CSV files for Excel and Google Sheets?
Yes. It exports standard CSV text and includes an optional UTF-8 BOM setting for Excel compatibility.
What CSV problems does it not solve?
It does not repair every possible broken export, infer missing business data, provide tax advice, or connect to private marketplace APIs.