CSV to JSON and JSON to CSV Converter
Convert CSV data to JSON (or JSON to CSV) with configurable delimiter, header row option, and RFC 4180-style quoting. Runs in your browser.
Runs 100% in your browser — nothing is uploaded.
JSON output
Frequently asked
How does it handle quoted values with commas inside?
The parser follows RFC 4180 conventions — fields with commas, quotes, or line breaks must be wrapped in double quotes, with internal quotes escaped by doubling them ("").
Semicolon or tab as delimiter?
Yes. Excel exports in some locales use semicolons; scientific tools often use tabs. Pick your delimiter from the dropdown.
What happens with nested objects when converting JSON to CSV?
Nested objects and arrays are serialized as their JSON string and placed into that cell. If you need flattened output, pre-process your JSON to a flat structure first.