CSV to JSON Converter
Transform CSV spreadsheet data into JSON format instantly. Perfect for APIs, web apps, and data processing.
No account required - Start instantly
From Spreadsheets to Code-Ready Data
APIs speak JSON. Databases understand JSON. Modern web applications live on JSON. But your data is often stuck in CSV format—exported from Excel, Google Sheets, or legacy systems.
Our converter transforms CSV files into properly structured JSON with one click. Column headers become keys, rows become objects. The result is clean, valid JSON ready for your application.
Everything processes in your browser. Sensitive business data, customer lists, financial exports—nothing leaves your device. Fast, private, and completely free.
Smart CSV to JSON Conversion
Intelligent parsing with full control
Auto-Detect Headers
Column headers automatically become JSON keys. Clean, semantic output.
Array or Objects
Output as array of objects or nested structure. Your choice.
Handle Any Delimiter
Comma, semicolon, tab, or custom. Auto-detection included.
Type Detection
Numbers stay numbers. Booleans stay booleans. Not everything becomes a string.
Large File Support
Process thousands of rows. Browser-based but powerful.
Instant Preview
See your JSON output before downloading. Verify the structure.
How to Convert CSV to JSON
Three simple steps
Upload Your CSV
Drag and drop your CSV file or paste data directly.
Preview JSON Output
See the converted JSON. Adjust settings if needed.
Download or Copy
Download as .json file or copy to clipboard.