Free developer utility
CSV to JSON Converter
Paste CSV with headers to convert rows into clean JSON objects. The converter runs locally in your browser, so exports, catalog data, and API prep work are not uploaded to a server.
When to use this CSV to JSON converter
Use it when spreadsheet exports, marketplace feeds, analytics data, or product lists need to become JSON for an API, script, no-code workflow, or documentation example.
CSV parsing behavior
- The first row becomes object keys.
- Quoted commas stay inside one field.
- Duplicate or empty headers are made safe with generated names.
- Type inference can convert numbers, booleans, and null values into native JSON values.
Related tools
JSON to CSV Converter, JSON Formatter, Text Cleaner, Word Counter, and All Tools Index.
FAQ
Does this CSV to JSON converter upload my data?
No. CSV parsing and JSON conversion run in your browser.
Does it support quoted commas?
Yes. Fields wrapped in double quotes can contain commas and escaped quotes.
What if my CSV has duplicate headers?
Duplicate headers are made unique by adding suffixes such as _2 and _3.