Does the tool handle CSV files with headers?

Yes. The first row is treated as the header row and its values become the keys in each JSON object. All subsequent rows become the data.

What if my CSV uses semicolons or tabs instead of commas?

The tool auto-detects the delimiter by inspecting the first few rows. Semicolon-delimited (common in European Excel exports) and tab-delimited files are both handled automatically.

What happens with empty cells?

Empty cells are converted to empty strings in the JSON output. If you prefer null values for empty cells, you can post-process the output in the JSON Repair or JSON Sorter tools.

Can I convert a CSV with thousands of rows?

Yes. The conversion runs entirely in your browser and is limited only by available memory. Files with tens of thousands of rows process in under a second on modern hardware.

CSV to JSON

Convert CSV files to JSON arrays with automatic delimiter detection

Input

Output

Shortcuts: Ctrl+Enter run · Ctrl+L clear · Ctrl+D download

About CSV to JSON

This tool converts CSV files and pasted CSV text into JSON arrays. It automatically detects the delimiter (comma, semicolon, or tab), uses the first row as keys, and produces clean JSON you can use directly in your code or import into a database. Ideal for transforming spreadsheet exports into API-ready data.

✓Auto-detects comma, semicolon, and tab delimiters
✓Uses first row as JSON object keys automatically
✓Trims whitespace and handles quoted fields with embedded commas
✓Produces a JSON array of objects ready to use in any application

CSV to JSON

About CSV to JSON

Frequently Asked Questions