Free Tool
CSV to JSON
Paste CSV data and convert it to a JSON array instantly. First row becomes property names. Supports multiple delimiters and auto-casts numbers, booleans, and empty fields.
CSV to JSON Converter
Delimiter
What is CSV to JSON?
CSV to JSON converts tabular CSV data into a JSON array of objects. The first row is treated as headers, and each subsequent row becomes an object with those headers as keys.
Type casting
Numbers and booleans are auto-detected and cast to their native JSON types. Strings that look like numbers (e.g., "42") become 42 in the JSON output.
Common uses
This conversion is frequently needed when importing data from spreadsheets or database exports into a JavaScript application, REST API, or configuration system.
How to use
- Paste your CSV data into the input area. The first row is treated as column headers.
- The JSON array appears in the output panel instantly, with automatic type casting for numbers and booleans.
- Copy the result with the "Copy" button.
Frequently Asked Questions
- Does the converter handle quoted CSV fields?
- Yes. Fields wrapped in double quotes are correctly parsed, including escaped quotes ("").
- What does "Auto-cast types" do?
- When enabled, numeric strings are converted to numbers, "true"/"false" to booleans, and empty fields to null. Disable it to keep all values as strings.
- Is the first row always treated as headers?
- Yes. The first row is used as property names for the JSON objects.
- Is any data sent to a server?
- No. All conversion happens in your browser. Nothing is transmitted or stored.