Free CSV to JSON Converter
Turn comma-separated data into JSON objects or arrays. Choose whether the first row contains column names, then copy or download the JSON result.
Cell values are kept as strings to preserve IDs and leading zeros.
Private: your files are processed in your browser and are never uploaded to our server.
How to use
- Paste CSV text or load a local CSV file.
- Choose whether the first row contains headers.
- Convert to JSON, then copy or download the result.
Convert CSV rows to JSON
When the first row contains headers, each subsequent row becomes an object keyed by those column names. Without headers, each row becomes an array. CSV quoting rules are used for commas, escaped quotes and line breaks inside quoted fields.
This converter does not infer data types: cell values remain strings. Duplicate or empty headers are given safe fallback names. Processing stays in your browser.
Frequently asked questions
Does it convert numbers to numeric JSON values?
No. CSV cell values are kept as strings to avoid guessing whether values such as IDs or leading-zero numbers should be numeric.
Can CSV values contain commas?
Yes. Put values containing commas inside double quotes according to CSV conventions.
Is the CSV uploaded?
No. Conversion is done locally in your browser.