CSV to JSON Converter

Runs in your browser — your files are never uploaded.

Turn a CSV file into a clean JSON array of objects. OkConverter uses the header row as keys and converts each row into an object, automatically detecting numbers, booleans and empty values. The whole conversion runs locally in your browser, so your data is never uploaded.

How to convert CSV to JSON

  1. 1

    Drop your .csv file onto the box, or click to choose one.

  2. 2

    OkConverter reads the header row and maps every data row to a JSON object.

  3. 3

    Click "Download" to save your formatted .json file.

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Frequently asked questions

How are the JSON keys chosen?+

The first row of your CSV is treated as the header, and each column name becomes a key in every JSON object.

Are numbers and booleans detected?+

Yes. Values that look like numbers or true/false are converted to real JSON numbers and booleans; empty cells become null. Everything else stays a string.

Are my files uploaded?+

No. The conversion runs entirely in your browser on your device — your CSV is never uploaded, stored, or logged.

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