CSV Validator
Upload a CSV file to validate its structure, encoding, and data integrity.
Drag & drop your file here
Supports .csv — max 10 MB
or paste from clipboard
What we check
Encoding
Verifies the file uses valid character encoding (UTF-8, ASCII, etc.)
Delimiter
Detects and validates the column delimiter used in the file
Headers
Checks that column headers are present, unique, and non-empty
Rows
Validates that all rows have a consistent number of columns
Quoting
Ensures quoted fields are properly opened and closed
Empty values
Detects empty or missing values across all rows
Data types
Checks that column values are consistent in type (numbers, dates, etc.)
RFC 4180 compliance
Validates compliance with the CSV standard (CRLF line endings, proper field quoting, escaped quotes)
Schema validation
Validates column names and cell data types against your schema definition
Learn More
CSV files are simple but error-prone. Learn how to validate structure, encoding, and data integrity.
What Is CSV Validation?
CSV (Comma-Separated Values) validation checks that a file conforms to the expected structure, encoding, and data format. While CSV appears simple, real-world files frequently contain issues: inconsistent column counts, wrong delimiters, encoding problems, unescaped quotes, and embedded newlines.