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CSV to JSON Converter

Convert CSV data to JSON format instantly in your browser

CSV to JSON Converter

Max 50 MB
Conversion Options
Delimiter
Output Format
Indentation

💡 Press Ctrl + Enter to convert immediately

How to Use CSV

  1. 1 Paste your CSV data or drag & drop a CSV file
  2. 2 The tool auto-detects the delimiter (comma, semicolon, tab)
  3. 3 Toggle "First row as headers" to use headers as JSON keys
  4. 4 Choose output format: Array of Objects or Array of Arrays
  5. 5 Select indentation style for readability
  6. 6 Copy or download your JSON result

What You Get

CSV to JSON converter with auto-detection, multiple output formats, and instant preview.

Input: name,age\nJohn,25\nJane,30

Output: [{"name":"John","age":25},{"name":"Jane","age":30}]

Input: Tab-separated values

Output: Proper JSON with auto-detected tab delimiter

Input: Large CSV file

Output: Pretty-printed JSON with type inference

How do I convert CSV to JSON online?

Paste your CSV data or upload a file, and the JSON output appears instantly. Choose between array of objects or arrays format, then copy or download.

What CSV delimiters are supported?

Comma (,), semicolon (;), tab, and pipe (|) are auto-detected. You can also manually select the delimiter if auto-detection isn't correct.

Does the first row become JSON keys?

By default, yes. The first row is treated as column headers that become JSON property names. Toggle this off to get arrays instead of objects.

Is my data safe when converting CSV to JSON online?

Yes, this converter runs entirely in your browser using JavaScript. Your data never leaves your device or gets uploaded to any server.

Can I convert large CSV files?

Files up to 50MB are supported. Processing happens locally in your browser. For very large files, there may be a brief delay.

How do I get array of arrays instead of objects?

Change the "Output Format" setting to "Array of Arrays" to get a 2D array like [["col1", "col2"], ["val1", "val2"]].

Why is my JSON showing escape characters?

Special characters in your CSV (quotes, newlines) are properly escaped in JSON output. This is correct behavior for valid JSON.

Can I convert JSON back to CSV?

Yes, use our JSON to CSV tool for the reverse conversion. It supports nested objects and arrays with full formatting options.

How do I handle CSV with quoted fields?

Quoted fields containing commas or newlines are automatically parsed correctly following RFC 4180 CSV standards.

All processing happens in your browser. Your data never leaves your device.