CSV to JSON
Convert CSV data to formatted JSON output
About CSV to JSON
CSV (Comma Separated Values) is the most common data export format from spreadsheets and databases, while JSON is the standard for modern APIs and web applications. This free CSV to JSON Converter instantly transforms any CSV data into properly formatted JSON, with headers becoming object keys and each row becoming a JSON object. Perfect for developers migrating data, building REST APIs and loading spreadsheet data into JavaScript applications.
How to Use CSV to JSON
- 1Paste your CSV data into the input area (first row should be column headers).
- 2Click "Convert to JSON" to transform the CSV into a JSON array.
- 3Toggle "Pretty Print" for readable formatting or "Compact" for minified output.
- 4Copy the JSON output or download it as a .json file.
Common Use Cases
Make sure your CSV has headers in the first row — these become the JSON keys. Wrap values containing commas in double quotes to avoid parsing errors.
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Frequently Asked Questions
What is the correct CSV format for conversion?
A valid CSV for conversion should: have column headers in the first row (these become JSON keys), separate values with commas, wrap values containing commas or newlines in double quotes, and use consistent columns across all rows. Most spreadsheet exports (Excel, Google Sheets) produce correctly formatted CSV.
What happens to CSV values with commas inside them?
Values containing commas must be wrapped in double quotes in the CSV format: Name,City becomes problematic if City is "Mumbai, Maharashtra". The correct CSV representation is Name,"City" with the value written as "Mumbai, Maharashtra". This tool handles quoted CSV values correctly.
Can I convert JSON back to CSV?
Yes, this tool supports JSON to CSV conversion as well. Paste a JSON array (where each item is an object with the same keys) and convert to CSV. The object keys become CSV headers and each object becomes a row. Deeply nested JSON may need flattening first.
What is the difference between CSV and TSV?
CSV uses commas as delimiters; TSV (Tab Separated Values) uses tab characters. TSV is sometimes preferred when values frequently contain commas (like addresses or names). Both formats store tabular data; the only difference is the separator character.