Open toolkit

Data Formats

CSV to JSON

Convert a CSV spreadsheet into a JSON array of objects, with each row becoming one object and each column header becoming a key. This is the format most web APIs and JavaScript applications expect.

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Frequently asked questions

Does the CSV need a header row?

Yes, the first row is used as the property names for each JSON object.

How are numbers and text handled?

Values are kept as strings by default, matching the plain-text nature of CSV, to avoid accidentally reformatting data like leading zeros or phone numbers.

Can I convert a large CSV file?

Yes, though very large files may take a little longer to process since everything runs in your browser.

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Open CSV to JSON
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