CSV to JSON Converter Online

Does this tool handle quoted fields with commas?

Yes. The parser fully supports RFC 4180 CSV: fields wrapped in double quotes can contain commas, newlines, and escaped double quotes (two consecutive double quotes).

Are numbers and booleans typed correctly in the JSON output?

Yes. Values that look like numbers, booleans (true/false), or null are automatically converted to the correct JSON type. Strings remain as strings.

What is the difference between array of objects and array of arrays?

Array of objects produces one JSON object per row using the CSV headers as keys — the most common format for data exchange. Array of arrays produces a 2D array where the first row contains headers and subsequent rows contain values — useful for matrix-style processing.

Can I convert JSON back to CSV?

Yes. Use the JSON → CSV mode. The tool accepts an array of objects or an array of arrays and produces a properly formatted CSV with headers.

Can I upload a file instead of pasting?

Yes. Click the upload button or drag and drop a .csv or .json file onto the input area. The file is read locally — nothing is uploaded to a server.

Is my data sent to a server?

No. All conversion happens inside your browser using JavaScript. Your data never leaves your device.

Is there a file size limit?

There is no built-in limit. The maximum size depends on your browser's available memory. Most CSV files up to several megabytes convert instantly.

Does the tool support different delimiters like semicolons or tabs?

Currently the tool supports comma-delimited CSV. Tab-separated (TSV) and semicolon-delimited support may be added in a future update.