How are commas inside quotation marks handled during CSV parsing?

In compliance with RFC 4180, fields enclosed in double quotes (e.g. "San Francisco, CA") are treated as single values, preventing false column splitting.

Does this tool convert numeric strings into actual JSON numbers?

Yes. When "Auto-parse Data Types" is enabled, strings like "42" and "true" are converted into native JSON numbers (42) and booleans (true) instead of remaining strings.

Can I convert TSV (Tab-Separated Values) or semicolon-delimited files?

Yes. Simply select the Tab ( ) or Semicolon (;) option in the delimiter dropdown to parse non-standard spreadsheet exports.

Is my financial or client spreadsheet data uploaded to any server?

No. All CSV parsing and JSON compilation occurs entirely in your local browser memory. No data is stored, logged, or sent over the internet.

Developer Tools

CSV to JSON Converter

Convert CSV spreadsheets and tables into clean JSON objects or arrays with header auto-detection, type parsing, and delimiter controls.

Records / Rows4

Columns Count6

Output FormatArray of Objects

Status

Ready

Delimiter:

First row is HeaderParse Numbers & BooleansMinify JSON

Raw CSV Input

Upload .csv••

Converted JSON Output

[
  {
    "id": 101,
    "name": "Adil Mian",
    "role": "Lead Engineer",
    "department": "Engineering",
    "salary": 125000,
    "active": true
  },
  {
    "id": 102,
    "name": "Sarah Connor",
    "role": "DevOps Specialist",
    "department": "Infrastructure",
    "salary": 110000,
    "active": true
  },
  {
    "id": 103,
    "name": "John Doe",
    "role": "UI/UX Designer",
    "department": "Design",
    "salary": 95000,
    "active": false
  },
  {
    "id": 104,
    "name": "Emma Watson",
    "role": "Product Manager",
    "department": "Product",
    "salary": 118000,
    "active": true
  }
]

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What is CSV to JSON Converter?

CSV to JSON conversion parses Comma-Separated Values into structured JSON arrays of objects according to RFC 4180 specifications. The first row automatically maps to object keys, subsequent rows map to values with automatic number and boolean type casting, and processing runs 100% in browser memory.

Designed for accuracy, speed, and privacy, this tool runs entirely on your local device with zero network latency.

How to Use the CSV to JSON Converter

1
Paste your CSV text into the editor, or upload a .csv spreadsheet file from your device.
2
Select your delimiter: Comma (,), Tab ( ), Semicolon (;), or Pipe (|).
3
Toggle "First Row as Header" to generate key-value objects, or uncheck it to produce an array of arrays.
4
Enable "Auto-parse Data Types" to automatically cast numbers and booleans into native JSON types.
5
Copy the structured JSON output or download a .json file.

Formula & Calculation Logic

Tokenizes CSV input accounting for escaped quotes ("...") and embedded line breaks. When headers are enabled, each row is transformed into a JavaScript object: { [header[i]]: parseValue(row[i]) }.

CSV Parsing: RFC 4180 Grammar -> Header Mapping [Row 0 = Keys] -> Type Casting [Numbers / Booleans]

CSV to JSON Converter Frequently Asked Questions

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