Paste or upload CSV: the header row becomes the JSON keys and numbers are detected automatically. Copy or download the result. No signup.
Do this automatically
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No — conversion happens entirely in your browser. Safe for exports containing client or financial data.
Values that look like numbers become JSON numbers; everything else stays a string. Quoted CSV fields (including commas and quotes inside) are handled correctly.
No fixed limit — your own browser does the work, and typical exports up to tens of thousands of rows convert instantly.