Validate CSV files before importing to databases, Excel, or analytics tools. Check structure, detect encoding issues, validate emails/dates/numbers. Get instant error reports with line numbers.
Drop your CSV file. Validation happens in your browser, files never leave your computer.
Scan for malformed rows, encoding problems, invalid emails/dates, empty cells, duplicates.
See detailed validation report: row/column count, data types, errors with line numbers.
Use 14 cleaning tools to fix issues, then download clean, validated CSV.
Check delimiter (comma, semicolon, tab), consistent column count per row, proper quoting.
Detect UTF-8, Latin-1, Windows-1252. Flag special characters (é, ñ, ü, 中文) that may break imports.
Check email syntax, detect typos (gmial→gmail), flag disposable addresses, find duplicates.
Detect 30+ date formats. Flag ambiguous dates (02/03/2023 = Feb 3 or Mar 2?). Suggest ISO 8601.
Find empty cells, whitespace-only values, null placeholders ("N/A", "NULL", "-").
Check for currency symbols, thousand separators, decimal formats. Flag non-numeric values in number columns.
Error: "Row 47 has 8 columns, but header has 10 columns"
Cause: Missing commas, extra commas, or unescaped quotes. Fix: Use neatcsv's auto-repair or manually check row 47.
Error: "Malformed characters in rows 12, 34, 89 (é→é, ñ→ñ)"
Cause: File saved as Latin-1 but opened as UTF-8 (or vice versa). Fix: Re-save with correct encoding or use neatcsv's auto-fix.
Error: "Rows 5, 23, 67 contain invalid dates: '32/01/2023', '2023-13-45'"
Cause: Typos, impossible dates (month 13, day 32), mixed formats. Fix: Use date normalization to convert to ISO 8601.
Upload your CSV file to neatcsv. The tool automatically checks: 1) File structure (rows, columns, delimiters), 2) Encoding (UTF-8, Latin-1, etc.), 3) Data quality (emails, dates, numbers), 4) Empty values and duplicates. You'll see a validation report with error locations.
CSV validation checks: File structure (consistent column count, proper delimiters), Encoding issues (special characters, UTF-8 vs Latin-1), Data types (valid emails, dates, numbers), Empty rows/cells, Duplicate rows, Header consistency.
Yes, neatcsv is free for files up to 10,000 rows (Starter plan, 9€/month). Unlike other validators that only check structure, neatcsv also validates data quality (emails, dates, numbers) and offers 14 cleaning tools to fix issues.
Yes. neatcsv auto-detects encoding (UTF-8, Latin-1, Windows-1252) and shows warnings for problematic characters. You'll see which rows have encoding issues and can fix them before importing to databases or Excel.
After validation, neatcsv shows errors with line numbers. Use the 14 built-in cleaning tools to fix issues: remove duplicates, validate emails, normalize dates, clean numbers, fix encoding, remove empty rows. Preview changes before downloading.
No. neatcsv is 100% browser-based. Upload your CSV file and validation happens instantly in your browser. No installation, no account required (for basic validation), files never leave your computer.
Check structure, encoding, and data quality. Fix errors instantly. From 9€/month.
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