Encoding Correction
Auto-detects non-standard character sets and converts them to clean UTF-8 without changing your data.
Header Normalization
Fix duplicate CSV
column headers.
Duplicate column names cause import failures in Shopify, WooCommerce, and SQL databases. We auto-rename or merge duplicate headers for a valid file.
Structure Normalization
Repairs delimiters, line endings and malformed headers so every column imports predictably.
Data-Safe Repair
Preserves your content while removing structural errors, empty rows and duplicate records.
How to use Header Normalization
Upload CSV
Select the CSV that is failing to import.
Auto-Repair
CSVFixer detects and repairs common format problems.
Download & Import
Download the clean file and import it immediately.
Why Duplicate Columns Matter
CSV import failures usually come from a file's encoding or structure, not the visible values. This tool corrects those hidden issues while keeping your records intact.
- check_circle Clean UTF-8 output without a BOM
- check_circle Consistent comma-separated columns
- check_circle Normalized headers and line endings
Frequently Asked Questions
Import Rejectionexpand_more
Most e-commerce platforms will reject a file if two columns have the same name (e.g., two 'Handle' or 'Price' columns).
Data Overwritingexpand_more
If a parser sees two columns with the same name, it might overwrite the first with the second. We prevent this loss.
Snake Case Conversionexpand_more
We also convert headers to clean snake_case to ensure maximum compatibility with modern databases.