CSV Validator
Validate CSV formatting syntax and check for column size mismatches. Fast, free, and fully client-side.
Input source
Result / Output
How the CSV Validator Works
Validates CSV files for RFC 4180 compliance, detecting uneven column counts, unclosed quotes, and delimiter inconsistencies.
Usage Example
Identifies ragged rows where line 42 has 5 columns while the header defines 6 columns.
Frequently Asked Questions
What is RFC 4180?
The official IETF standard specification defining CSV format rules, quoting conventions, and escape mechanisms.
Browse more
See all CSV tools.