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Converters

CSV to JSON Converter

Convert CSV data into structured JSON arrays with automatic type detection, quoted field support, and pretty-printed output.

3 rows
CSV Input 4 lines · 169 chars
JSON Output
[
  {
    "name": "Alice Johnson",
    "email": "alice@example.com",
    "age": 29,
    "role": "Developer",
    "active": true
  },
  {
    "name": "Bob Smith",
    "email": "bob@example.com",
    "age": 34,
    "role": "Designer",
    "active": false
  },
  {
    "name": "Carol Williams",
    "email": "carol@example.com",
    "age": 27,
    "role": "Manager",
    "active": true
  }
]

All conversion runs entirely in your browser. Your data is never sent anywhere.

CSV is the universal format for spreadsheet data and database exports, but JSON is what modern APIs, web applications, and NoSQL databases actually consume. Our free CSV to JSON Converter transforms tabular data into structured JSON arrays with intelligent type detection — numbers become numbers (not strings), booleans become booleans, null values are handled gracefully, and quoted fields with embedded commas or newlines are parsed correctly per RFC 4180. Built entirely client-side using a custom CSV parser, your sensitive data never leaves your browser. The pretty-printed JSON output is ready to paste into code, configuration files, or database seed scripts.

How to Use

  1. Paste your CSV data — Enter comma-separated values in the left panel. The first row is automatically detected as the header, defining the JSON property names.
  2. Review the JSON output — The right panel instantly shows your data as a formatted JSON array with proper indentation and type-correct values.
  3. Copy or download — Click Copy JSON to grab the output, or Download to save as a data.json file.

Key Features

  • Auto Type Detection

    Numbers detected as integers or floats, booleans as true/false, nulls properly handled.

  • RFC 4180 Compliant

    Handles quoted fields with commas, escaped quotes, and multiline values correctly.

  • Pretty-Printed JSON

    Output is formatted with 2-space indentation for readability in any text editor or IDE.

  • Real-Time Conversion

    Every keystroke re-parses and regenerates the JSON instantly — no buttons needed.

  • Copy & Download

    One-click clipboard copy or download as .json file ready for import into any system.

  • 100% Private

    All parsing runs in your browser. No uploads, no server processing, no data exposure.

When to Use CSV to JSON Conversion

  • API Development: Convert spreadsheet exports into JSON payloads for REST API testing, seed data, or mock endpoints.
  • Database Migration: Export SQL query results as CSV, then convert to JSON for import into MongoDB, Firebase, or other document databases.
  • Configuration Files: Transform tabular configuration data into structured JSON for application configs, package.json scripts, or CI/CD pipelines.

Related Tools

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