CSV Cleaner
Fix messy CSV files instantly. Trim stray whitespace, strip duplicate rows, remove blank lines, normalize headers and convert delimiters — all right in your browser.
Raw CSV input
Cleaned CSV output
🔒 Runs in your browser — nothing is uploaded to a server.
What this tool does
- Trims whitespace — removes accidental leading and trailing spaces from every cell.
- Removes duplicate rows — identifies and strips identical rows while keeping your header intact.
- Cleans empty lines — drops blank rows that disrupt data imports.
- Normalizes headers — optionally converts header text to UPPERCASE or lowercase.
- Converts delimiters — switch seamlessly between commas, tabs, semicolons, and pipes.
- Private by design — processed locally in your browser with no file uploads.
When to use CSV Cleaner
Exported data from legacy databases and user forms often arrives messy — padded with spaces, peppered with blank lines, or containing accidental duplicate submissions. Running your CSV through this cleaner prepares it perfectly for import into Excel, Google Sheets, databases, or JSON converters.
Working with data every day?
If you move data between tools regularly, these automate the parts this converter can't:
- Zapier — connect the apps your data lives in
- Airtable — a spreadsheet-database for teamwork
- Coefficient — sync live data into Google Sheets & Excel
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