CSV / JSON converter
Convert CSV to JSON array or JSON array to CSV with auto-detected headers
CSV / JSON Converter
Convert between CSV and JSON formats
TL;DR
What is CSV / JSON converter?
CSV (Comma-Separated Values) is a plain text format for tabular data where each row is a line and columns are separated by commas (or another delimiter). JSON arrays of objects represent the same tabular data in a structured format more suitable for APIs and JavaScript. Converting between them is a common data pipeline task.
Common use cases
- ‣Data import: convert a CSV export from Excel or Google Sheets into JSON for ingestion by an API or database
- ‣Reporting: convert a JSON API response into CSV for analysis in a spreadsheet
- ‣ETL pipelines: transform flat file exports into structured JSON for further processing
Frequently asked questions
How are commas inside field values handled?
RFC 4180 specifies that fields containing commas must be enclosed in double quotes. A double quote inside a quoted field is escaped by doubling it (""). Most CSV parsers follow this convention, though real-world CSV files from different tools often have minor variations.
What happens to different data types when converting CSV to JSON?
CSV has no type information: every value is a string. The converter may attempt to infer numbers and booleans, but type inference is inherently ambiguous (is "01" a number or a string with a leading zero?). Always verify types after conversion and apply explicit parsing in your code.