About the CSV to JSON Converter
Drop a CSV export and get a typed JSON array you can paste into a fixture, seed script or API test. The parser handles quoted fields, embedded commas and line breaks inside values.
How to use it
- 1Paste or drop the CSVThe first row is used as the header unless you turn that off.
- 2Configure the parsePick the delimiter, choose whether to infer numbers and booleans, and decide how to handle blank cells.
- 3Copy the JSONThe array is formatted for readability and can be downloaded as a .json file.
Why use this csv to json converter?
- Nothing leaves your device. The work happens in your browser tab. There is no upload endpoint in this app, so your files and text cannot be stored, logged or seen by us.
- No upload wait. You skip the round trip to a server entirely. Results are limited by your own CPU, not by network speed or queue size.
- Free, no account, no quotas. No sign-up wall, no watermark, no daily limit. Optional accounts only exist to save favourites and presets across devices.
Frequently asked questions
Is my data safe to use here?
Yes. This tool runs entirely in your browser using JavaScript. Nothing you paste or open is sent to a server, and the page keeps no copy after you close it.
Do I need to create an account?
No. Every tool is fully usable without signing in. An account only adds saved favourites and reusable presets.
Does it work on a phone?
Yes. The interface is mobile-first with large touch targets and a stacked layout, so it works on phones and tablets as well as desktops.
Does it support semicolon or tab delimiters?
Yes. Comma, semicolon, tab and pipe are all supported, which covers most regional Excel exports.
How are duplicate column names handled?
Later columns with the same header are suffixed with an index (name, name_2 and so on) so that values are not overwritten silently.