Check your CSV.
Keep your data here.
Find blanks, exact duplicate rows and formatting risks before importing.
1. Choose your data
No server uploads, accounts, AI or tracking. UTF-8 CSV only; up to 2 MB, 10,000 rows and 100 columns. Nothing is saved after closing.
2. Read the report
Choose a file or load the sample.
Issues
Only the first 100 issues appear below; downloads contain all issues. Record numbers include the header; quoted multi-line cells count as one record. No automatic cleaning.
Need rule-based cleaning?
DataVexaLab CSV Cleaning is a separate, human-reviewed service: one non-confidential CSV, up to 1,000 rows / 10 columns, proposed $20. It is not available to order from this local tool yet. No file is sent when you use this checker. Do not email or upload personal data.