Private JSON tool
CSV to JSON Converter
Convert CSV text into a pretty-printed JSON array. The first CSV row becomes object keys, and all values stay as strings.
About browser CSV to JSON conversion
This tool parses CSV text in the browser and writes a JSON array of objects. It does not upload pasted text or opened files.
CSV is a text format, so this converter keeps every cell as a string. That avoids guessing whether a value like 00123, true, or null should be changed.
Does this upload my files?
No. Everything on this page runs locally in your browser, so your files are never uploaded to a conversion server. Close the tab and nothing is left behind.
After any required processing engine has loaded, repeated conversions can keep working offline. You can verify the claim with the site's reproducible browser privacy audit.
FAQ
Is my CSV uploaded?
No. The CSV text is read and converted locally in your browser. It is not sent to privatefiletools.com.
How are columns named?
The first row is treated as the header row. Each later row becomes an object with those header names as keys.
Are numbers converted to number values?
No. CSV cells are kept as strings, including values that look like numbers, booleans, or null.
Does this handle quoted CSV fields?
Yes. Quoted commas, quotes, CRLF line endings, and line breaks inside fields are supported.