Free CSV to JSON Converter
Paste CSV data below to convert it to a JSON array of objects. Supports custom delimiters and header row mapping. Your data stays entirely in your browser.
About CSV to JSON Converter
This free CSV to JSON converter transforms tabular CSV data into a JSON array of objects, where each row becomes a JSON object and the header row provides the keys. All parsing is done in your browser using JavaScript — your data is never sent to a server.
Common use cases include importing spreadsheet exports into JavaScript applications, converting database exports for use in REST APIs, and preparing data for MongoDB or Firebase ingestion.
How to Convert CSV to JSON
Paste CSV Data
Copy CSV from a spreadsheet or text file and paste it into the input area.
Set Options
Choose the delimiter (comma, semicolon, or tab) and confirm whether your data includes a header row.
Convert
Click "Convert to JSON". The output shows a formatted JSON array.
Copy or Download
Copy the JSON to clipboard or download as a .json file.
Frequently Asked Questions
Uncheck "Header row" and the converter uses automatic column names: col1, col2, col3, etc. You can rename them in the resulting JSON after converting.
Yes. The parser follows RFC 4180: fields enclosed in double quotes may contain the delimiter character, and double-quote characters within a quoted field are escaped as two consecutive double quotes.
Yes. Select "Tab" as the delimiter and paste your TSV data. The converter handles it exactly like CSV but uses tab as the field separator.
Yes. All conversion happens entirely in your browser. No data is sent to any server. This makes it safe to use with sensitive or confidential data.