CSV to JSON Converter
Convert CSV to JSON and back, with quoted fields, custom delimiters and headers.
About this tool
Convert CSV to JSON and back, with quoted fields, custom delimiters and headers. Your data never leaves your browser. Client-side processing with zero waiting. No accounts, no paywalls, no watermarks.
How to use
- 1
Type or paste your data in the input box
- 2
Choose your options and run the tool
- 3
Copy or download the result — done!
Frequently asked questions
▸How are commas and line breaks inside a field handled?
The parser follows RFC 4180: a field wrapped in double quotes may contain the delimiter, line breaks and doubled quotes, which come back as a single quote in the output.
▸What happens to nested objects when converting JSON to CSV?
Top-level keys become columns and nested objects or arrays are written as compact JSON inside the cell, so nothing is silently dropped. Keys missing from a row become empty cells.
▸Is there a size limit, and is my data uploaded?
No hard limit — parsing runs in your browser and even tens of thousands of rows finish in a fraction of a second. Nothing is uploaded, so exports and customer lists stay private.