The toolkitText & code
Convert CSV to a JSON array of objects, or JSON to CSV. Handles quoted fields, commas and line breaks inside cells, and comma, semicolon or tab delimiters.
USEFUL DETAILS
The first CSV row becomes the object keys; turn off Header row to get row arrays instead. Values stay as text by default so leading zeros survive; tick Detect numbers to convert safe numbers, true, false and null. JSON to CSV uses every key found across all objects as a column, and nested values are written as JSON text.
Header row on. The quoted comma stays inside the note and the leading zeros are kept.
Input
name,code,note
Ada,00123,"Hi, there"Result
[
{
"name": "Ada",
"code": "00123",
"note": "Hi, there"
}
]Choose JSON → CSV and paste an array of objects, such as [{"name":"Ada"}]. Every key found in any object becomes a column, in the order it first appears. Missing values are left blank and nested objects or arrays are written as JSON text.
Values stay as text by default so codes like 00123 keep their leading zeros. Tick Detect numbers to turn plain numbers, true, false and null into JSON values. Very long numbers stay as text so no digits are lost.
Yes. Choose Semicolon as the delimiter, which is common in exports from European versions of Excel. Choose Tab for cells pasted straight from a spreadsheet.
No. The conversion runs in your browser and nothing you paste is sent to a server.