How to Convert Excel (XLSX) to CSV — Complete Guide
Need to convert an Excel spreadsheet to CSV? Learn the best methods, handle special characters, and preserve your data integrity.
CSV (Comma-Separated Values) is the universal data exchange format. Whether you're importing data into a database, feeding a CRM, or preparing data for analysis, converting Excel to CSV is a fundamental skill.
Why Convert XLSX to CSV?
Database import — Most databases accept CSV directly
CRM systems — Salesforce, HubSpot, Mailchimp use CSV
Data analysis — Python, R, and SQL work natively with CSV
API integration — Many APIs accept CSV uploads
Cross-platform — CSV opens in any text editor or spreadsheet app
Smaller file size — CSV is plain text, much smaller than XLSX
How to Convert with Convert999
Go to Convert999
Upload your XLSX file
Select CSV as the output format
Click Convert and download
The conversion handles multiple sheets, special characters, and date formatting automatically.
Common Issues and Solutions
Special Characters
CSV uses commas as delimiters. If your data contains commas, the converter wraps those fields in quotes automatically.
Multiple Sheets
Excel files can have multiple sheets, but CSV only supports one. Each sheet is exported as a separate CSV file.
Date Formatting
Dates in Excel are stored as numbers internally. The CSV conversion preserves the displayed format (e.g., 2025-01-15).
Encoding
For international characters (accents, CJK characters), use UTF-8 encoding. Convert999 uses UTF-8 by default.
CSV vs XLSX — When to Use Each
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