Developer ToolsCode ValidatorsFree Tool
CSV Validator
Check that every row in a CSV file has the same number of columns as the header row.
How to Use CSV Validator
- 1Paste your CSV data (first row treated as header)
- 2Click Process
- 3Review any rows with a mismatched column count
Frequently Asked Questions
It counts the columns in your header row, then checks every subsequent row has the same column count, flagging any row that doesn't match with its row number and actual column count.
No — it splits on every comma literally, so a quoted field like "Smith, John" will be miscounted as two columns instead of one. This is a simple comma-count check, not a real CSV parser that would respect quoting rules.
No — it only checks column-count consistency across rows, not the content or type of any field.
No — the check runs entirely in your browser.
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