CSV Validator

What this tool does

Paste CSV text or upload a CSV file to check its structure. The validator detects common text encodings, parses quoted fields, and checks that records use a consistent number of columns.

Validation options

• Choose a single-byte delimiter; comma is the default and a tab is supported.
• Specify whether the first record is a header; headers are enabled by default.
• Optionally require an exact number of columns. When omitted, the width is inferred from the header or first record.

The result reports whether the CSV is valid, its row and column counts when available, the number of structural errors, and the first failing source line and logical record. Those positions can differ when a quoted field spans multiple lines.

This tool validates CSV syntax and record width. It does not enforce column data types, required business fields, or application-specific rules.