CSV to JSON

Paste a CSV or drop a file and get clean JSON straight away. Choose a list of objects, a list of lists or an object keyed by the first column. Nothing is uploaded.

Choose file

CSV input

JSON output

Delimiter JSON shape Formatting First row is the header Detect numbers, true/false and empty values Trim spaces around values

How to use it

Paste CSV or choose a file.
Pick the JSON shape and whether the first row is the header.
Turn type detection on to get numbers and true/false instead of text.
Copy the result or download it as a .json file.

Common questions

Is my data uploaded?

No. The conversion happens in your browser.

How big a file can I use?

Files up to about 10 MB work well. Larger files may be slow.

Which delimiters work?

Comma, semicolon, tab and pipe are detected automatically.