CSV to JSON Converter
Convert CSV to JSON or JSON to CSV in your browser, with header and delimiter options.
Private & SecureRuns in your browser — nothing is uploaded
Easy to UseJust paste or type — instant results
Free ForeverUnlimited use, no sign-up
Fast & ReliableAdvanced tech, fast and stable
CSV and JSON hold the same data in two shapes: a table of rows, or structured records. This converts between them both ways, so data from a spreadsheet fits an app, or the other way round. Everything runs in your browser, so your data never leaves your device.
How to use: CSV to JSON
- 1Enter inputChoose CSV-to-JSON or JSON-to-CSV.
- 2Set optionsPaste your data on the left.
- 3ProcessPick the delimiter and header option.
- 4Get resultCopy the converted result.
Common use cases
Feed spreadsheet data to an appTurn a CSV export into JSON that an app or API expects.
Make JSON readable as a tableConvert JSON records into a CSV you can open in a spreadsheet.
Move data between toolsBridge a tool that speaks CSV and one that speaks JSON.
Inspect a data fileFlip a file to whichever shape is easier to read.
Good to know
Quote fields that contain commasIn CSV a value with a comma or a line break has to be wrapped in quotes, or the columns shift, so check the result.
Nested data flattensCSV is a flat table, so nested JSON objects or lists get flattened or turned into text; deeply nested data may not round-trip cleanly.
Headers become field namesThe first CSV row is used as the field names, so make sure it's a clean header row, not data.