CSV ↔ JSON
FreeConvert between CSV and JSON with column mapping and type inference
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How it works
1
Paste
Paste your CSV data or JSON array into the input editor.
2
Convert
Select the conversion direction and click Convert to transform between CSV and JSON formats.
3
Copy
Copy the converted output, ready for use in spreadsheets, databases, or APIs.
Frequently asked questions
Is my data sent to a server?+
No. All conversion runs in your browser. Your data never leaves your device, so you can safely convert spreadsheets containing personal information or business data.
How does it handle CSV headers?+
The first row of your CSV is treated as column headers by default. These headers become the JSON object keys. You can toggle this off if your CSV has no header row.
Does it handle commas inside quoted fields?+
Yes. The parser follows RFC 4180 and correctly handles commas, line breaks, and double quotes inside quoted fields. Escaped quotes are also handled properly.
What JSON structure does CSV convert to?+
CSV converts to an array of objects, where each row becomes an object with keys from the header row. This is the most common format for importing data into applications.