Does the first row have to be headers?

Yes. The converter uses the first row as the property (key) names for the JSON objects. If your CSV does not have headers, add a header row before converting.

How does it handle quoted fields with commas?

Fields surrounded by double quotes that contain commas are treated as a single field value — the comma inside the quotes is not treated as a delimiter.

Are numeric values converted to numbers?

Yes. If a field's value parses as a valid number, it is stored as a JSON number rather than a string. To keep all values as strings, this can be disabled.

What delimiters are supported?

Comma (,), semicolon (;), and tab characters are supported. European CSV files commonly use semicolons; TSV (tab-separated) files use tabs.

Can I convert to a JSON object instead of an array?

Yes. If you specify a key column, the output can be a JSON object keyed by that column's values rather than an array — useful when you need to look up records by ID.

CSV to JSON Converter

Converts a CSV file's content into a JSON array of objects, using the first row as property names. Handles quoted fields containing commas, empty values, and numeric type detection. Supports comma, semicolon, and tab delimiters.

Runs entirely in your browser — your input is never uploaded, stored, or logged.

Turn spreadsheet data into a JSON array ready for APIs or JavaScript applications. To go the other way, use the JSON to CSV converter.

How to Use

1Paste your CSV content into the input box.
2Toggle whether the first row should be used as the key header.
3The JSON output updates instantly.
4Copy or download the JSON output.

Common Uses

→Convert a spreadsheet export to JSON for use in an API or app
→Transform CSV data for a JavaScript or Python application
→Convert configuration lookup tables to JSON objects
→Prepare data for ingestion into a JSON-based database

Examples

Basic CSV

Input

name,age,city
Alice,30,London
Bob,25,Paris

Output

[{"name":"Alice","age":30,"city":"London"},{"name":"Bob","age":25,"city":"Paris"}]

Frequently Asked Questions

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