CSV to JSON Converter
Paste your CSV data below to instantly convert it into a structured JSON array of objects. The first row is used as headers, quoted fields are handled correctly, and the output is ready to copy into your code or API. Everything runs client-side - your data stays in your browser.
Try These Examples
Contact list- A simple table of names, emails, ages, and citiesProduct catalogue- Items with prices, categories, and quoted descriptions containing commasEmployee records- Staff data with departments, start dates, and some empty fields
How It Works
The converter follows a three-step process to turn your CSV text into valid JSON:
- Header extraction - The first line of the CSV is split into column names. These become the keys in each JSON object. Leading and trailing whitespace is trimmed from each header.
- Row parsing - Each subsequent line is parsed field by field. The parser respects double-quoted fields so that commas, newlines, and escaped quotes inside a value are preserved correctly, following RFC 4180 conventions.
- JSON assembly - Each parsed row is mapped to the headers to create an object. All row objects are collected into an array and formatted with two-space indentation using
JSON.stringify(data, null, 2).
Because the entire process uses standard JavaScript string methods and JSON.stringify, no external libraries are needed and the tool works offline once the page has loaded.
Frequently Asked Questions
How does this CSV to JSON converter handle commas inside field values?
If a field value contains a comma, wrap it in double quotes. The parser follows RFC 4180 conventions: any field enclosed in double quotes is treated as a single value, even if it contains commas, newlines, or other special characters. To include a literal double quote inside a quoted field, escape it by doubling it ("").
What format does the JSON output use?
The tool outputs a JSON array of objects. Each object represents one row of CSV data, with keys taken from the first row (the header row). For example, a CSV with columns name, age, and city produces objects like {"name": "Jane", "age": "29", "city": "Springfield"}.
Does this tool send my data to a server?
No. The entire conversion happens in your browser using JavaScript. Your CSV data never leaves your machine - there are no network requests, no uploads, and no server-side processing. You can verify this by checking your browser's Network tab.
Can I convert JSON back to CSV?
Yes. Use our JSON to CSV Converter tool to turn a JSON array of objects back into CSV format. Both tools are fully client-side and free to use.