CSV to JSON Converter
Convert CSV to JSON online. Auto-detects the delimiter, handles quoted fields, and can type numbers and booleans. Free, and your file never leaves the browser.
Input
Result
The result appears here as you type.
What this tool is for
A spreadsheet export needs to become an array of objects before an API will accept it. This does the conversion in the browser, which means a customer list or an internal report is never uploaded anywhere to be converted.
How to use it
- Paste CSV text or drop a .csv file onto the input.
- Confirm the delimiter and whether the first row is a header.
- Choose whether numbers and booleans should be typed rather than left as strings.
- Copy the JSON or download it as a file.
Frequently asked questions
Are quoted fields with commas handled?
Yes. Quoted fields, escaped quotes inside them, and newlines inside a quoted value all parse correctly, which is where naive split-on-comma conversions fail.
What if my file has no header row?
Turn the header option off and each row becomes an array of values instead of an object with named keys.
Is there a size limit?
Only your machine. Everything runs locally, so the limit is browser memory rather than an upload cap. Files of a few megabytes are comfortable.