CSV ↔ JSON Converter
Convert lists between CSV spreadsheet formats and JSON array structures instantly. Local secure parsing.
Tabular CSV to JSON Array Converter
CSV (Comma-Separated Values) is the standard raw format exported by Excel, Google Sheets, databases, and logs. Translating tables into JSON arrays simplifies importing records into databases (like MongoDB, PostgreSQL) or integrating datasets with API endpoints.
Running CSV conversions online can leak sensitive user information, emails, or company reports contained in the spreadsheet. Our CSV mapper uses your browser's local sandbox to read and convert values, keeping your datasets private.
Frequently Asked Questions
Can I upload large files directly?
Yes. You can use the 'Upload File' button or drag and drop files into the input box. Files are read locally into browser memory using HTML5 FileReader; they are never uploaded to any backend server.
How does row header selection work?
When 'Use First Row / Include Headers' is checked, CSV rows are parsed as objects where the keys are the column names from the first line. If unchecked, the dataset is parsed as a simple two-dimensional array of string rows.
Are commas inside quoted strings handled?
Yes. The CSV parser handles standard CSV formatting rules, including escaping quotes ("") and ignoring commas located within double quotes.