CSV to JSON Converter Online — Free Tool

Seamlessly convert comma-separated values (CSV) data into structured JSON format with robust parsing and quoting support.

CSV

Runs locally in your browser. Supports quoted CSV.

Delimiter

Input CSV

Output JSON

[
  {
    "name": "Alice",
    "age": 30
  },
  {
    "name": "Bob",
    "age": 22
  }
]

Privacy note: All processing happens entirely in your browser. No data is sent to our servers.

About this tool

CSV (comma-separated values) is the lingua franca of spreadsheets and exports. JSON is the standard for APIs and modern apps. This converter parses CSV rows into a JSON array of objects, respecting quoted fields and headers.

Use it when integrating spreadsheet exports into JavaScript, Python, or Node pipelines without spinning up a desktop tool.

Common use cases

Turning spreadsheet exports into API-ready payloads
Importing CRM or analytics CSV into a web app
Debugging column alignment before database import
Converting tabular reports for JSON-based tools

How to use

Paste CSV text or upload a .csv file from your device.
Confirm the first row is treated as column headers if applicable.
Review the JSON array output with one object per row.
Copy or download the JSON for your script or API client.

This page is available at /tools/csv-to-json/.

Understanding the result

Each CSV row becomes a JSON object; header names become property keys.
Quoted fields with commas inside are parsed as single values.
Empty cells typically become empty strings unless you configure null handling.
Large files may slow the browser—split very big exports if needed.

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FAQ

How are CSV headers handled?

The first row is usually used as JSON keys. Data rows map to those keys by column position.

What delimiter is supported?

Comma is standard. Some exports use semicolons; check your source or preprocess if columns misalign.

Can I convert JSON back to CSV?

Yes. Use the JSON to CSV converter for the reverse transformation.

Is my data uploaded to a server?

Conversion runs in your browser. Files are not sent to external servers.