CSV to JSON Converter
Parse CSV data and convert it to JSON with configurable options.
Drop a CSV file here or paste below
Options
How to Convert CSV to JSON
- Paste your CSV data in the input box, or drag and drop a
.csvfile onto the drop zone. - Configure options: choose a delimiter, toggle headers, and enable number/boolean parsing.
- Click Convert to generate the JSON output and preview the data in a table.
- Click Download .json or Copy to use the output.
What is a CSV to JSON Converter?
This tool converts CSV (Comma-Separated Values) data into structured JSON (JavaScript Object Notation) format. CSV is a simple tabular format used by spreadsheets and databases, while JSON is the standard data interchange format for web APIs and modern applications. Converting between the two is a common task for developers, data analysts, and anyone working with data pipelines.
All conversion happens in your browser — your data is never sent to any server. Upload a file or paste your CSV directly to get started.
Common Use Cases
- Data migration: Convert exported spreadsheet data into JSON for importing into a database or API
- API payload preparation: Transform CSV exports into JSON arrays ready to send to a REST API
- Spreadsheet data processing: Convert Excel/Google Sheets exports to JSON for JavaScript applications
- Database imports: Prepare structured JSON data for NoSQL databases like MongoDB or Firestore
- Frontend data binding: Convert static CSV data files to JSON for use with JavaScript frameworks
FAQ
What is CSV?
CSV (Comma-Separated Values) is a plain text format for storing tabular data. Each line represents a row, and each value within a row is separated by a delimiter (usually a comma). The first row often contains column headers. CSV is supported by virtually all spreadsheet applications including Excel, Google Sheets, and Numbers.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight, human-readable data interchange format. It represents data as key-value pairs in objects {} and ordered lists in arrays []. JSON is the standard format for REST APIs, configuration files, and data storage in modern web applications. It is natively supported in every major programming language.
What happens if my CSV has commas inside values?
If a value contains the delimiter character (e.g. a comma), it should be wrapped in double quotes in the CSV: "value with, comma". This tool's CSV parser handles quoted values correctly, preserving commas within quotes and ignoring them as delimiters. If your data uses a different delimiter (semicolon, tab, pipe), select it in the Options section.
Can I convert JSON back to CSV?
This tool converts CSV to JSON. For the reverse direction — JSON to CSV — use a dedicated JSON to CSV converter tool. Both conversions are straightforward for flat (non-nested) data structures, but deeply nested JSON objects may require flattening before they can be represented as a flat CSV table.
What is the difference between arrays and objects in the output?
When "First row as headers" is enabled, each CSV row becomes a JSON object with named keys matching the header row: {"name":"Alice","age":30}. This is the most useful format for most applications. When headers are disabled, each row becomes an array of values: ["Alice","30"]. Arrays are more compact but require positional access rather than named access.