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CSV Lint

CSV input
Summary
Detected delimiter
,
Columns
3
Rows
4 (data: 3)
Errors
0
Warnings
0
Issues
Normalized CSV
Options
Parsing
Output
Display-only options. Internal analysis uses full precision and original input.

About CSV Lint

CSV Lint checks the structural integrity of your CSV files and produces a normalized export. It validates column consistency, quoted fields, stray quotes, header duplicates, comment lines, and BOM markers.

What it does

  • Detects delimiter automatically or honors your choice.
  • Parses quoted fields with either double-quote escaping or backslash escaping.
  • Flags inconsistent row lengths and unclosed quotes.
  • Reports duplicate or empty header cells when a header row is present.
  • Generates clean, normalized CSV with your preferred newline style.

Tips

  • Enable “Enforce consistent columns” to locate malformed rows fast.
  • Set a comment prefix (e.g. #) to skip commented lines during linting.
  • Use “Trim unquoted whitespace” when spaces around delimiters are not meaningful.