CSV to JSON Converter
Convert CSV to JSON online for free. Proper RFC 4180 parsing of quoted fields, auto number/boolean typing, any delimiter. Runs 100% in your browser.
Input · csv0 chars
Output · json0 chars
🔒 100% private: this tool runs entirely in your browser. Your data is never uploaded, stored or logged anywhere.
How to csv → json
- Paste your CSV — from a file, Excel export or API response.
- Choose the delimiter and whether the first row is a header.
- Copy the JSON array or download it as a .json file.
FAQ
Does it handle quoted fields with commas inside?
Yes. Fields quoted with double quotes may contain commas, tabs, newlines and escaped quotes ("") — all parsed correctly per RFC 4180.
Why are some values numbers and others strings?
With "Auto-detect" enabled, values that look like numbers or true/false become JSON numbers and booleans. Turn the option off to keep everything as strings.
What if my CSV has no header row?
Uncheck "First row is header" — keys become col1, col2, … matching the column order.