CSV to JSON Converter

Transform your CSV data into clean, structured JSON — instantly and securely in your browser.

100% Browser-Based

Files Never Leave Your Device

No Server Uploads

Zero Data Collection

How It Works

Upload or drag & drop your CSV file

Our engine automatically detects the CSV format and validates the structure

Click "Convert to JSON" to transform your data

Preview the result and download your JSON file

Automatic header detection and column mapping

Handles quoted fields, commas in values, and multiline cells

Preserves data types (numbers, booleans, strings)

Supports large files with efficient streaming

100% browser-based — your data never leaves your device

Does it handle CSV files with different delimiters?

Yes, our converter auto-detects common delimiters including commas, semicolons, tabs, and pipes.

What happens to empty values in the CSV?

Empty values are preserved as empty strings in the JSON output, maintaining data integrity.

Is there a file size limit?

The converter runs entirely in your browser, so the limit depends on your device memory. Most files up to 50MB convert smoothly.