CSV ↔ JSON Converter – Free Online Tool

Convert CSV to JSON or JSON to CSV instantly. Handles quoted fields and headers. 100% browser-based.

Features

🔄

Convert CSV to JSON or JSON to CSV with a single click.

📊

Automatically detects the first row as headers for CSV to JSON conversion.

🔒

All processing is local in your browser. Your data never leaves your device.

📋

Copy the converted result to your clipboard instantly.

📥

Upload a .csv or .json file directly to convert.

⚙️

Auto-detect or manually set comma, semicolon, or tab as the delimiter.

Select CSV to JSON or JSON to CSV conversion.

Paste your CSV or JSON content into the input panel.

The converted output appears instantly in the output panel.

Copy the result to your clipboard or download as a file.

How does CSV to JSON conversion work?

The first row is treated as headers by default. Each subsequent row becomes an object with header names as keys. Quoted fields are properly parsed.

Is my data sent to a server?

No. All conversion is done locally in the browser using JavaScript. Your data never leaves your device.

What delimiters are supported?

Comma (,), semicolon (;), and tab (\t) are supported. The tool auto-detects the delimiter if the file has multiple types.

Can I convert JSON arrays to CSV?

Yes. If your JSON is an array of objects, each object becomes a CSV row with consistent columns.