Converters · Free online tool

CSV → JSON Converter

Convert CSV data to JSON with header, delimiter, quote, and empty-row controls, then copy or download the result.

Quick answer: Paste CSV, choose whether the first row contains headers, select the delimiter, and press Convert. The tool outputs valid, formatted JSON locally.
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How this csv to json helps

This CSV to JSON converter turns spreadsheet-style data into structured JSON for APIs, test fixtures, static sites, and application configuration. It handles quoted fields, escaped quotes, line breaks inside quoted values, comma, semicolon, and tab delimiters, optional header rows, and blank-line filtering. You can keep every value as a string or let the tool infer booleans, nulls, and numbers where the conversion is unambiguous. The output is formatted for review and can be copied or downloaded as a .json file. Conversion runs in your browser, so internal exports and unpublished datasets remain private. A Pro option supports batch conversion of multiple CSV files without a server. This tool is ideal for quick transformations, not a replacement for validating a complex data pipeline; review inferred types before loading the JSON into production systems.

Last updated: . All processing happens locally; no tool input is sent to a server.

Real-world examples

Prepare API fixtures

Convert a spreadsheet export into an array of JSON objects for tests.

Inspect quoted data

Parse values containing commas or line breaks without splitting them incorrectly.

Convert tabular exports

Handle tab- or semicolon-delimited exports from spreadsheet applications.

Frequently asked questions

Can the converter use the first row as keys?

Yes. Enable headers and each row becomes an object keyed by the corresponding column name.

Does it support quoted commas?

Yes. Quoted fields can contain delimiters, line breaks, and escaped double quotes.

Will numbers remain numbers?

Enable type inference to convert unambiguous numeric, boolean, and null values. Disable it to preserve strings exactly.

Can I convert multiple files?

Pro mode enables local batch conversion for multiple CSV files and packages the results for download.