CSV to JSON Converter — Transform Spreadsheet Data Instantly [2026]
Convert CSV data to a JSON array of objects. Auto-detects headers, handles quoted fields and custom delimiters. Preview, copy, or download results. Free, browser-based.
What is CSV to JSON?
How to Use CSV to JSON
Paste your CSV data into the input area or click "Load Sample" to try an example. The first row is used as field names (headers) by default. Choose your delimiter (comma, semicolon, tab, or pipe) and click "Convert". The JSON output appears on the right. Copy it or download as a .json file.
How CSV to JSON Works
Common Use Cases
- Importing spreadsheet exports into JavaScript applications
- Converting CSV data dumps into JSON for API consumption
- Preparing data for NoSQL databases like MongoDB
- Transforming Excel CSV exports for web applications
- Creating JSON fixtures from spreadsheet test data
Frequently Asked Questions
Does it handle quoted fields with commas inside?▼
Yes. Fields wrapped in double quotes can contain commas, newlines, and escaped quotes (two double quotes). The parser follows RFC 4180 conventions.
What delimiters are supported?▼
The tool supports comma (,), semicolon (;), tab, and pipe (|) as delimiters. Choose the one that matches your CSV format.
Does it convert numbers automatically?▼
Yes. Values that look like numbers (integers and decimals) are automatically converted to JSON numbers instead of strings. You can disable this with the "Keep all values as strings" option.
Is my data secure?▼
Yes. All conversion happens in your browser. No data is uploaded to any server.