Use the first row as field names
This converter uses the first CSV row as object keys. Every header must have a name and each name must be unique. Each data row needs the same number of fields, including empty fields, or the converter reports its row number.
Input: id,name
0012,Alex
Output: [{"id":"0012","name":"Alex"}]Keep text values as text
CSV has no built-in number type. DevToolbox keeps every cell as a string, so a postal code such as 0012 or a long account identifier is not silently rounded or stripped of leading zeros. Convert selected fields to numbers later, only when your application knows their meaning.
Quoted fields can contain commas and newlines
Wrap a field in double quotes when it contains a comma or a line break. Write a literal quotation mark as two quotation marks inside a quoted field. A line break inside those quotes remains part of one cell, not a new record.
Input: name,notes
Alex,"Uses CSV, JSON"
Output: [{"name":"Alex","notes":"Uses CSV, JSON"}]Check malformed rows before using the JSON
An unclosed quoted field, duplicate header, or row with the wrong field count is rejected. Fix the CSV source rather than guessing which column a value belongs to. The converter processes the text in your browser and lets you copy or download the result.