JSON to CSV Converter
Convert JSON arrays to CSV and CSV to JSON online. Supports custom delimiters, proper escaping, nested objects, and file download.
Examples
About JSON to CSV Converter
This tool converts between JSON arrays and CSV (Comma-Separated Values) format. JSON is the standard for APIs and web development, while CSV is widely used for spreadsheets, data analysis, and database imports.
The converter handles nested objects by serializing them as JSON strings in CSV cells, properly escapes quotes and commas, and supports custom delimiters (comma, tab, semicolon). When converting CSV to JSON, it auto-detects numbers and booleans.
All processing happens client-side in your browser. No data is sent to any server.
How to Use This JSON to CSV Converter
This free online tool lets you convert between JSON and CSV formats instantly. Whether you need to export API data to a spreadsheet or import CSV data into a web application, this converter handles it all.
- Choose your mode — select "JSON to CSV" to convert a JSON array into CSV format, or "CSV to JSON" to parse CSV data into a JSON array.
- Select a delimiter — choose comma, tab, or semicolon based on your needs.
- Paste your data into the input area. For JSON to CSV, input must be a JSON array of objects. For CSV to JSON, the first row should contain column headers.
- Copy or download — use the copy button for the converted output, or click "Download" to save as a file.
All processing happens locally in your browser. Your data is never sent to a server.
Common Use Cases
- API data export — Convert JSON API responses to CSV for analysis in Excel, Google Sheets, or data visualization tools.
- Database import — Convert CSV data exports into JSON format for importing into MongoDB, Firebase, or other document databases.
- Data migration — Transform data between formats when migrating between systems that use different formats.
- Report generation — Convert structured JSON data into CSV for generating reports and sharing with non-technical stakeholders.
- Blockchain data analysis — Export on-chain data (transactions, events, token transfers) from JSON to CSV for spreadsheet analysis.
Related Tools
Frequently Asked Questions
How do I convert JSON to CSV?
Paste your JSON array of objects into the input field and the tool will automatically extract all keys as CSV column headers and convert each object into a row. Nested objects are serialized as JSON strings in the CSV cell. You can download the result as a .csv file.
How do I convert CSV to JSON?
Switch to 'CSV to JSON' mode, then paste your CSV data with headers in the first row. The tool will parse each row into a JSON object using the headers as keys. Numbers and booleans are automatically detected and converted to their proper JSON types.
What delimiters are supported?
The tool supports three delimiters: comma (,) which is the standard CSV format, tab (\t) for TSV (Tab-Separated Values), and semicolon (;) which is common in European locales where commas are used as decimal separators.
How are nested objects handled in CSV?
When converting JSON to CSV, nested objects and arrays are serialized as JSON strings within the CSV cell. For example, {"address": {"city": "NYC"}} becomes a cell containing the JSON string {"city": "NYC"}. Values containing commas or quotes are properly escaped with double quotes.
Can I use this tool for large datasets?
Yes, the tool processes data entirely in your browser and can handle datasets with thousands of rows. However, for very large files (over 50 MB), you may experience slower performance depending on your device. Consider splitting large datasets into smaller chunks.
Is my data secure when converting JSON to CSV?
Absolutely. All conversion happens client-side in your browser. No data is sent to any server. This makes the tool safe for sensitive business data, personal information, and proprietary datasets.
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