How This JSON to CSV Converter Works
Paste a JSON array of objects, or a single object, and this json to csv converter online produces a CSV file instantly, no upload, no signup, no server round trip. It's a genuine convert json to csv workflow: pick a delimiter, toggle the header row, set a null-value replacement, and the CSV updates as you type, then copy or download the result.
Handling Nested Objects and Arrays
Real-world JSON is rarely flat. This nested json to csv converter walks each object recursively and flattens nested objects into dot-notation column headers, address.city, address.zip, so a deeply nested record still turns into a usable json array to csv output with one column per leaf value. Arrays inside a field aren't expanded into extra columns, they're stringified as a single comma-joined cell instead, quoted automatically if that would collide with your chosen delimiter.
Delimiter, Headers, and Null Values
This json to csv delimiter control lets you pick whatever separator matches where the CSV is headed, comma for most spreadsheet software, semicolon for European locale Excel, or tab if you actually want a json to tsv converter instead of comma-separated output. The json to csv with headers toggle controls whether the first row is a header row of column names or the tool skips straight to data, and the json to csv null values field lets you replace empty or missing values with a placeholder like N/A instead of leaving cells blank.
Common Uses
This json to csv converter free tool is built for pulling data out of an API response, a MongoDB export, or a config file and getting it into a spreadsheet, a data import tool, or a colleague who only wants a CSV. It also handles rows with inconsistent keys gracefully, missing fields become empty or null-value cells rather than throwing an error, which matters for real API data where not every object has every field.