CSV / JSON Converter
Convert between CSV and JSON formats instantly in your browser.
CSV (rows and columns, like a spreadsheet) and JSON (nested key-value data, common in APIs and code) are two very different ways of structuring data - this tool converts between them in either direction, which is a frequent need when moving data from a spreadsheet into an application, or turning API/JSON data into something you can open in Excel.
Frequently asked questions
CSV is inherently flat (rows and columns), so deeply nested JSON objects/arrays get flattened or represented as a simplified structure - very complex nested JSON may not have a perfectly clean CSV equivalent.
Yes - the first row is treated as column headers, which become the key names when converting to JSON.
For simple, flat JSON structures, yes. For deeply nested JSON, some structure may be simplified during the CSV conversion, so a round trip isn't guaranteed to perfectly restore complex nesting.