Use our free CSV Validator Online to check for formatting errors, detect broken rows, and fix delimiter issues. Ensure your data is perfectly structured for database imports, Excel, or Google Sheets instantly in your browser.
Data integrity is the backbone of any successful database migration or analysis project. However, CSV (Comma Separated Values) files are notorious for being fragile. A single stray comma, an unclosed quotation mark, or an extra line break can break your entire import process. Our CSV Validator Online acts as a safety net, scanning your files for structural inconsistencies before you hit "upload" on your production systems.
Most modern software, from SQL databases to CRM platforms like Salesforce, expects a very specific CSV structure. If row 452 has 11 columns while the rest have 10, the import will likely fail or, worse, corrupt your data. By using a CSV linter, you can catch these "silent killers" instantly. This tool is especially useful when you've used our JSON to CSV Converter and want to double-check the output structure.
Cleaning your data shouldn't be a chore. Follow these simple steps:
.csv file from your device.We understand that CSV files often contain sensitive information like customer emails or financial records. That’s why our CSV format checker operates entirely client-side. Your data is processed in your browser's memory and is never sent to our servers. For further data cleaning, you might also find our Duplicate Line Remover helpful for pruning large datasets.
Yes. While "CSV" stands for Comma Separated Values, many regions use semicolons, and developers often use Tabs (TSV). You can manually select your delimiter from the dropdown menu or let the tool auto-detect it.
In CSV files, if a field contains a delimiter (like a comma), it must be wrapped in double quotes. If you start a quote but don't close it, the parser thinks the rest of the file is part of that single field. This tool identifies exactly which line has the missing quote.
The limit is based on your browser's available memory. It can comfortably handle files up to several megabytes (tens of thousands of rows). For extremely large files (GBs), we recommend using a command-line linter.