Convert CSV data to JSON format instantly. Free, private, works entirely in your browser. No upload to servers.
Drop CSV file here or click to upload
CSV to JSON Converter is a free online tool that transforms CSV (Comma-Separated Values) data into JSON (JavaScript Object Notation) format instantly. All processing happens entirely in your browser — no data is ever sent to a server, ensuring complete privacy and security. Whether you are building APIs, importing data, or preparing datasets for analysis, this tool handles it all with customizable parsing options and instant preview.
Yes, absolutely. All conversion happens entirely in your browser. Your CSV data is never sent to any server, ensuring complete privacy and security.
The tool supports comma, semicolon, tab, and pipe delimiters. You can select the appropriate delimiter from the dropdown menu before converting.
Pretty Print adds indentation and line breaks to make the JSON readable. Minify removes all unnecessary whitespace to produce the most compact output possible.
Yes, you can drag and drop a CSV file onto the drop zone or click to browse and select a file from your device.
Transpose mode converts columns into top-level objects instead of rows. This is useful when your CSV columns represent different entities rather than records.
You can choose to output empty cells as null, empty string, or omit the key entirely from the JSON object.
There is no artificial size limit. However, extremely large files (megabytes) may cause browser performance issues. For most use cases, the tool handles files of any practical size instantly.
Yes, simply click the Download button and the result will be saved as a .json file. You can also use the Copy button to copy the result to your clipboard.