CSV ↔ JSON Converter
Convert CSV to JSON and back. Handles quoted fields, custom delimiters and optional header rows.
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What is CSV to JSON Conversion?
CSV (Comma-Separated Values) files store tabular data in plain text. JSON represents the same data as an array of objects where each row becomes an object and each column header becomes a key. Converting between them is common in data pipelines, API integrations, and spreadsheet automation.
How to convert CSV to JSON online
- Paste your CSV (with a header row) into the Input panel.
- Choose the direction: CSV to JSON or JSON to CSV.
- The converted output appears instantly.
- Copy or download the result for use in your project.
Frequently Asked Questions
Does the CSV need a header row?
Yes. The first row of your CSV is used as the key names in the JSON output. If your CSV has no headers, you will need to add a header row before converting.
What delimiter does the tool support?
The tool auto-detects commas and semicolons as delimiters. If your CSV uses a different delimiter such as a tab, you may need to replace it first.
Can I convert a large CSV file?
Yes. All conversion runs in your browser with no upload limit. Very large files may take a moment, but no data is sent to any server.
What does the JSON output look like?
The JSON output is an array of objects. Each object represents one row, with keys taken from the header row. For example, a CSV row "Alice,30" with headers "name,age" becomes {"name":"Alice","age":"30"}.