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CSV to JSON

ConvertersFree · Private

Convert CSV files to JSON arrays instantly in your browser. Auto-detects headers and delimiters, handles quotes and escaping correctly. Your data stays private.

CSV Input
Drop a file here, or click to browse
JSON Output

What is CSV to JSON conversion?

Converting CSV to JSON transforms tabular spreadsheet data into a format that APIs, web applications, and NoSQL databases can consume directly. Each CSV row becomes a JSON object, with column headers as keys — making it straightforward to import spreadsheet data into MongoDB, Firebase, or any REST API.

How to convert a CSV file to JSON

  1. Paste your CSV text or drop a .csv file.
  2. The delimiter is auto-detected (comma, semicolon, or tab). Override it if needed.
  3. If your CSV has a header row, leave First row is a header checked — column names become JSON keys.
  4. Copy the JSON array or download it. Need the reverse? Use our JSON to CSV converter.

What about quoted fields and special characters?

The converter uses PapaParse, the most robust CSV parsing library available. It correctly handles:

  • Fields containing commas, wrapped in double quotes
  • Escaped quotes ("" inside quoted fields)
  • Multi-line fields
  • Numeric and boolean auto-detection (so 30 becomes a JSON number, not a string)

Privacy when converting spreadsheet data

Spreadsheets regularly contain names, email addresses, financial figures, and other personal data. This converter runs entirely in your browser — your CSV data never leaves your device. Processing is done by PapaParse running in client-side JavaScript, with zero server interaction.

Frequently Asked Questions

How do I convert a CSV file to JSON?
Paste your CSV text or drag and drop a .csv file. The converter automatically detects the delimiter and outputs a JSON array of objects.
Does it handle CSV files with quoted fields?
Yes. Fields containing commas, newlines, or quote characters are handled correctly per RFC 4180.
What if my CSV has no header row?
Toggle "No Header Row" and the tool will use column indices (col0, col1, ...) as JSON keys.

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