Convert CSV to JSON
A CSV as JSON: any delimiter, any encoding, numbers and dates typed.
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How to use Convert CSV to JSON
- 1Select your file, or drop it on the page
- 2Choose how, then run it
- 3Download converted.json
Your file is opened in an isolated sandbox with no internet access, processed and deleted with it. It is read the way people's spreadsheets really are — headers that are not on row 1, merged cells, totals pasted at the bottom, dates in two formats — and everything that is changed is listed back to you.
Questions
How do I convert CSV to JSON?
Upload the CSV and download the JSON: one object per row, keyed by the header.
Does it work with semicolon or tab separated files?
Yes. The delimiter and the encoding are detected, including UTF-16 exports.
Are numbers written as numbers?
Yes. Amounts become numbers, dates ISO dates and empty cells null — not everything as text.
What is JSON Lines?
One JSON object per line, the format many databases and data tools load fastest. Choose it under Format.