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CSV Validator

XML & YAML Tools

Check CSV data for inconsistent column counts and unclosed quoted fields.

Input

Result

How to use

Validating CSV

Paste the rows and press Validate to see a summary and any problems.

  1. Paste CSV data.
  2. Press Validate.
  3. Fix the reported lines.

Frequently asked questions

What is checked?

Column counts are compared to the header row and the double-quote balance is verified.

Is my data uploaded?

No, validation runs locally in your browser.

Related tools

CSV Formatter Normalize and align CSV or TSV data with automatic delimiter detection. CSV to JSON Converter Convert CSV or TSV rows into a JSON array using the first row as the key names. JSON Validator Check whether your JSON is valid and see a clear explanation of any syntax problem. XML Formatter Pretty print XML with consistent indentation and optional attribute wrapping. YAML Formatter Parse and re-serialise YAML with consistent indentation and validation. YAML Validator Validate YAML syntax and get a precise error when indentation or structure is wrong.