CSV to JSON / JSON to CSV
Convert CSV to JSON or JSON to CSV. Handles headers, arrays, and nested data. Useful for data migration, API integration, and spreadsheet processing. Free online CSV JSON converter.
CSV JSON converter
Result
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What is this?
CSV (comma-separated values) is a spreadsheet format; JSON is a data format for APIs. This converter transforms between them: CSV rows become JSON objects, with the first row as keys. The tool handles quoted values, commas inside fields, and special characters. CSV is universal—Excel, Google Sheets, and databases all support it. JSON is the standard for web APIs. Converting between them is common when moving data between systems. Nested JSON structures may flatten when converted to CSV. For complex nested data, preprocessing might be needed. The converter runs in your browser—your data stays private.
When to use
Use for importing spreadsheets into apps, exporting API data to Excel, or data migration. Example: Export contacts from CSV to JSON for an app. Import JSON API response into a spreadsheet. Developers integrate with APIs. Data analysts move between tools. Migrate data between systems. Export database results for analysis. Import spreadsheet data into applications. Essential for data workflow. Handles headers and arrays. Check the output for complex structures. Paste, convert, and use.
How to use
Select conversion direction and paste your data. CSV should have headers in the first row. JSON should be an array of objects or a single object. The tool handles quoted values and special characters.
CSV Format
First row should contain column headers. Each subsequent row represents a data record. Use quotes for values containing commas or special characters.
Frequently asked questions
- Paste your CSV data (with headers in the first row) and select "CSV → JSON". The tool will parse the CSV and convert it to a JSON array of objects.
- Paste your JSON array (or single object) and select "JSON → CSV". The tool will extract all keys as headers and convert each object to a CSV row.
- Yes. The CSV parser handles quoted values, escaped quotes (""), and commas within quoted fields. This follows standard CSV formatting rules.
- Nested objects are converted to CSV by flattening keys. For complex nested structures, you may need to preprocess the JSON before conversion.