CSV / JSON Converter

📖 CSV/JSON Converter Guide

What is a CSV/JSON Converter?

CSV (Comma-Separated Values) and JSON (JavaScript Object Notation) are the two most common data exchange formats. CSV stores data in plain-text tabular form — compact and Excel-compatible. JSON stores data in key-value structures — highly readable and ideal for programmatic processing. This tool supports bidirectional conversion between the two formats, no installation required — just paste and convert.

Key Features

• CSV to JSON: Parse CSV text into an array of JSON objects, automatically recognizing header field names
• JSON to CSV: Convert JSON arrays to CSV format, automatically extracting all fields as headers
• Delimiter selection: Supports comma, tab, and semicolon delimiters
• Header setting: Toggle whether the first row is treated as header or data
• JSON indent: Supports 2 spaces, 4 spaces, Tab, and minified output formats
• Table preview: Visualize converted data in a table
• Copy & download: One-click copy result or download as file

CSV Parsing Rules

This tool strictly follows the RFC 4180 standard for CSV parsing: if a field contains the delimiter, double quotes, or newlines, it must be wrapped in double quotes. Double quotes inside a field are escaped with two consecutive double quotes (""). For example, the field value He said "Hello", World should be written in CSV as "He said ""Hello"", World". The tool correctly handles all these edge cases.

Typical Use Cases

When you export CSV from Excel and need to import it into a database or process it in code, converting CSV to JSON first makes programmatic access easier. When API-returned JSON data needs to be viewed by non-technical staff in Excel, convert it to CSV for direct opening. Web-scraped tabular data can be converted back and forth between CSV and JSON to fit different tool requirements.

How to Use

Step 1: Select the conversion direction (CSV→JSON or JSON→CSV). Step 2: Set the delimiter, header row, and JSON indent format as needed. Step 3: Paste your data into the left input box. Step 4: Click "Convert" — the result appears in the right output box, with a table preview below. Step 5: Click "Copy Result" or "Download File" to get the converted data.