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CSV to JSON Converter
Switch between CSV and JSON in one click. Free, no sign-up, fully private.
What it does
CSV to JSON treats the first row as headers and turns each following row into an object. JSON to CSV reads an array of objects and writes a header row plus quoted data rows. Both directions handle quoted fields, commas inside values, and multi-line cells correctly.
Common uses
Preparing spreadsheet exports for an API, converting API responses into a spreadsheet, or cleaning data between tools.
Private by design
Parsing happens locally in JavaScript. Your data never leaves your device.
Planning estimate only. Results use the list prices shown and may differ from your actual bill. Terms
Frequently asked questions
Does it handle commas inside fields?
Yes. Properly quoted CSV fields with embedded commas, quotes, or line breaks are parsed correctly.
What if my JSON objects have different keys?
The converter collects every key seen across all objects into the header row, leaving blanks where a row lacks a key.
Is my data sent to a server?
No. Everything happens in your browser.