What is type inference in CSV to JSON?

Type inference automatically converts numeric strings to numbers and 'true'/'false' strings to boolean values in the JSON output. Without it, all values remain as strings.

CSV to JSON — Convert CSV Files to JSON Online

Delimiter

Infer types (numbers, booleans) Skip empty rows Pretty-print JSON

CSV input 0 chars

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JSON output

About the CSV to JSON Converter

CSV (Comma-Separated Values) is the universal format for tabular data — exported from spreadsheets, databases, and data pipelines. JSON is the standard data interchange format for APIs and web applications. This tool bridges the two: paste your CSV, click Convert, and get a clean JSON array of objects ready to use in code.

How the conversion works

The first row of your CSV is treated as the header row and becomes the keys of each JSON object. Each subsequent row maps to one object in the output array. Quoted fields containing delimiters or newlines are handled correctly according to RFC 4180.

Type inference — when enabled, numeric values are output as numbers and true/false strings become booleans rather than quoted strings
Custom delimiters — supports comma, semicolon, tab, and pipe for TSV and other variants
Empty row skipping — rows where all values are empty are omitted from the output
Pretty-print — formats the JSON with 2-space indentation for readability; disable for compact single-line output

CSV to JSON vs JSON to CSV

MyToolkit has both directions. Use CSV to JSON when you have spreadsheet or database exports that you want to use in an API or JavaScript application. Use JSON to CSV when you have API response data that you want to analyse in a spreadsheet.

Frequently Asked Questions

What does CSV to JSON conversion do?

It converts tabular comma-separated data into a JSON array of objects. The first row is used as the object keys, and each subsequent row becomes one object in the array.

Does this tool support delimiters other than commas?

Yes — comma, semicolon, tab, and pipe are all supported. Select the appropriate delimiter from the dropdown before converting.

What is type inference?

Type inference automatically converts numeric strings to actual numbers and "true"/"false" strings to boolean values in the JSON output. Without it, all values remain as quoted strings.

Is my CSV data sent to a server?

No. All conversion happens entirely in your browser. Your data never leaves your device.

What is the difference between CSV to JSON and JSON to CSV?

CSV to JSON converts tabular spreadsheet data into structured JSON objects. JSON to CSV does the reverse — it takes a JSON array of objects and exports it as a flat CSV file. MyToolkit has both tools.

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