CSV to JSON Converter
Convert CSV to JSON and JSON to CSV online. Free CSV-JSON converter — supports headers, custom delimiters, and pretty print.
Three steps to get started
Choose direction
Select "CSV → JSON" to convert a CSV file, or "JSON → CSV" to export JSON data as a spreadsheet.
Paste your data
Paste your CSV or JSON into the input area. For CSV, select the correct delimiter if it is not a comma.
Copy the result
Click Copy to grab the converted output and use it in your application, database, or spreadsheet tool.
CSV to JSON conversion explained
CSV and JSON are the two most common formats for exchanging structured data. CSV is favored by spreadsheet users, database exports, and data scientists. JSON dominates REST APIs, configuration files, and web application data stores.
Converting between them is a daily task for developers and data analysts:
- API preparation: Export data from Google Sheets or Excel as CSV, then convert to JSON to POST to an API
- Data import: Take a JSON API response and convert to CSV for analysis in Excel or Tableau
- Database seeding: Convert a CSV data dump to JSON for seeding a MongoDB or Firebase database
- ETL pipelines: Transform data between systems with different format expectations
This tool correctly handles quoted fields that contain commas (e.g., "Smith, John"), escaped quotes, and multi-character values across all supported delimiter types.
The JSON output is pretty-printed with 2-space indentation for readability. No data ever leaves your browser — everything is processed client-side, instantly, with no file size limits beyond your device's available memory.