CSV to JSON
Convert CSV data into clean JSON arrays instantly. Customizable delimiter, header row detection, and more.
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CSV to JSON — convert tabular data to structured JSON
Need to convert CSV to JSON? FormatList's free online CSV to JSON converter transforms rows of comma-separated values into clean, structured JSON arrays in milliseconds. Perfect for data migration, API integration, or preparing datasets.
The tool parses your CSV, uses the first row as property names (or auto-generates keys), and produces a JSON array of objects. Each column becomes a property, each row becomes an object.
Common use cases
- Data migration — convert spreadsheet exports to JSON for APIs.
- API development — transform CSV data into JSON payloads.
- Data analysis — prepare CSV data for visualization or processing.
- Database imports — convert CSV exports to JSON for NoSQL databases.
- Configuration — turn tabular config data into structured JSON files.
How to convert CSV to JSON
- Paste your CSV data into the input panel on the left (or click Upload to load a file).
- Select the delimiter (comma, tab, semicolon, or pipe).
- Toggle "First row is header" on or off depending on your data.
- The JSON output appears automatically on the right.
- Click Copy to copy the JSON to your clipboard.
CSV to JSON FAQ
How does the CSV to JSON converter work?
It parses your CSV data — detecting headers and rows — and converts each row into a JSON object. The first row is used as property names, and each subsequent row becomes an object in the resulting JSON array.
Can I use different delimiters?
Yes. You can choose from comma, tab, semicolon, or pipe delimiters. The tool also supports custom quote characters for handling values that contain the delimiter.
Does the tool handle quoted values?
Yes. Values wrapped in double quotes are handled correctly, including values that contain commas, newlines, or special characters within the quotes.
What if my CSV has no header row?
You can toggle the 'First row is header' option. When disabled, the tool generates numeric keys (key_0, key_1, etc.) for the columns.
Is my data sent to a server?
No. All conversion happens locally in your browser. Your data never leaves your computer.
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