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›devwrench --run csv-to-json

Free CSV to JSON Converter
for developers.

Convert CSV to JSON instantly with this free online CSV to JSON converter. Supports quoted fields, configurable delimiters, and runs entirely in your browser.

Paste your CSV

Generated JSON

[
  {
    "name": "Karlo",
    "email": "karlo@example.com",
    "city": "Montreal"
  },
  {
    "name": "Sophie Tremblay",
    "email": "sophie@example.com",
    "city": "Montreal, QC"
  }
]

Supported

  • Comma-delimited CSV
  • Semicolon-delimited CSV
  • Tab-delimited CSV
  • Quoted fields such as "Montreal, QC"
  • Escaped quotes using ""
  • Live CSV to JSON conversion

Automatically handled

  • Missing values are converted to empty strings
  • Extra spaces in headers are trimmed
  • Empty lines are ignored
  • JSON output is formatted and indented automatically

Not supported yet

  • Multiline quoted CSV fields
  • Automatic type inference for numbers and booleans
  • Custom quote characters

Free online CSV to JSON converter

This tool converts CSV data into formatted JSON instantly in your browser. It works as a CSV to JSON converter, a comma separated values to JSON parser, and a fast way to transform spreadsheet-like data into developer-friendly JSON.

Developers often need to convert CSV exports into JSON for APIs, scripts, seed data, frontend apps, or quick debugging. This tool handles common CSV formatting cases including quoted fields and configurable delimiters.

The conversion runs locally in your browser. Your CSV is not uploaded, stored, or sent anywhere.

Example

name,email,city
"Sophie Tremblay",sophie@example.com,"Montreal, QC"

Paste this CSV into the converter above to instantly generate the equivalent JSON output.

Convert CSV to JSON online

Use this converter to turn CSV files, spreadsheet exports, or copied table data into JSON for JavaScript, TypeScript, APIs, and development workflows.

Common use cases

  • Convert spreadsheet exports into JSON for APIs
  • Transform CSV rows into seed data for apps
  • Prepare mock JSON payloads for testing
  • Convert semicolon-separated CSV files into structured JSON

How it works

The converter reads the first CSV row as headers, parses each following row, then maps values into JSON objects using the selected delimiter.

Quoted fields are supported, so values like "Montreal, QC" stay intact instead of being split incorrectly.

The resulting JSON is formatted automatically so you can copy it directly into your project, API request body, mock file, or script.

FAQ

What is a CSV to JSON converter?

A CSV to JSON converter transforms comma separated values into structured JSON objects that can be used in JavaScript, APIs, databases, or test data.

Does it support quoted CSV fields?

Yes. This tool supports quoted values such as "Montreal, QC" and escaped quotes using the standard CSV double quote syntax.

Can I use semicolons or tabs instead of commas?

Yes. You can switch the delimiter between comma, semicolon, and tab directly in the tool interface.

Is this CSV to JSON tool safe?

Yes. The conversion happens locally in your browser and your data is not uploaded.

More developer tools

DevWrench provides a growing collection of browser-based developer tools including JSON utilities, converters, encoders, and debugging helpers.