CSV/JSON Converter
Bidirectional CSV and JSON converter with custom delimiters, header detection, and pretty printing options.
What is CSV and JSON?
CSV (Comma-Separated Values) is the lowest-common-denominator data format — every spreadsheet, database, and analytics tool can export it. JSON (JavaScript Object Notation) is the lingua franca of web APIs and modern config files. The two formats encode the same tabular data, but with different trade-offs: CSV is compact and Excel-friendly but has no native type system and inconsistent escaping rules across vendors. JSON is verbose but unambiguous, with native numbers, booleans, nulls, and nested objects. Round-tripping between them is a frequent task for ETL work, API testing, and spreadsheet import — and the tricky bits are quoted fields containing commas, embedded newlines, and type inference. This bidirectional converter handles all of them. Working with raw JSON? Try the JSON Formatter; need to switch JSON to YAML config? Use the JSON to YAML tool.
CSV to JSON
JSON to CSV
CSV Input
Delimiter:
Comma (,)
Has Headers:
Pretty Print:
Indent:
2 spaces
JSON Output
How to use this tool
- 1Pick your directionChoose CSV → JSON or JSON → CSV. The input area on the left accepts paste, drag-and-drop, or typed data.
- 2Set delimiter and header optionsConfirm the delimiter (comma is default) and toggle 'first row is header'. For JSON → CSV, pick whether to flatten nested objects.
- 3Read the converted outputThe right pane shows the converted result, pretty-printed for JSON. Copy the output or export to a .csv / .json file.