CSV to JSON Converter
Convert CSV data to JSON format instantly — supports comma, semicolon, and tab delimiters with automatic header row detection.
About CSV to JSON Converter
Our free CSV to JSON Converter transforms your CSV (Comma-Separated Values) data into JSON (JavaScript Object Notation) format instantly. This is essential when you need to import spreadsheet data into web applications, APIs, or any system that requires JSON input.
The converter supports multiple delimiters — commas, semicolons, and tabs — making it compatible with CSV files from different regional settings and applications. When "First row is header" is checked, the first row of your CSV is used as keys for the JSON objects, creating an array of key-value objects. When unchecked, each row becomes an array of values.
Properly handles quoted fields containing delimiters, line breaks within quotes, and escaped characters. The pretty print option formats the JSON with indentation for readability, while unchecking it produces compact JSON for minimal file size. All processing happens in your browser — your data is never sent to any server.
Frequently Asked Questions
Q What is the difference between CSV and JSON?
CSV (Comma-Separated Values) is a simple text format where each row is on a new line and values are separated by commas. JSON (JavaScript Object Notation) is a structured data format that uses key-value pairs and nested structures. CSV is best for tabular data and spreadsheets, while JSON is better for hierarchical data and web applications. JSON is more expressive but CSV is more compact for simple tables.
Q Does the converter handle quoted fields?
Yes, the converter properly handles fields enclosed in double quotes, which is the standard CSV escaping mechanism. This means values containing the delimiter character, newlines, or quotes themselves will be parsed correctly. For example, a field like "Smith, John" will be treated as a single value even though it contains a comma.
Q When should I use the "First row is header" option?
Check "First row is header" when your CSV's first row contains column names (which is the most common format). This produces an array of objects like [{"name": "John", "age": "30"}]. Uncheck it when your CSV has no header row — this produces an array of arrays like [["John", "30"]]. Most CSV files exported from spreadsheets include a header row.