📊 JSON to CSV Converter
Paste JSON, select columns, preview and download as CSV. Nested JSON flattened automatically. Free, private, no signup.
About This JSON to CSV Converter
This JSON to CSV converter transforms any JSON array into a clean, download-ready CSV file entirely in your browser. Paste raw JSON, select which columns to include, preview the first five rows, and export — no data ever leaves your device. Whether you are extracting API responses, preparing data for a spreadsheet, or migrating records between systems, a reliable JSON to CSV converter removes the friction from the process entirely.
Most free tools only handle flat JSON — a simple array of objects with string and number values.
This JSON to CSV converter goes further by automatically flattening nested objects using dot
notation. A field like user.address.city becomes its own column, giving you full
control over deeply structured data without writing any code.
Nested JSON Flattening
When this JSON to CSV converter encounters a nested object — such as {"user": {"name": "Alice", "city": "London"}}
— it walks the structure recursively and creates dot-notation column names: user.name
and user.city. Nested keys appear highlighted in the column selector so they are easy
to identify, and you can include or exclude individual nested fields without affecting others.
Column Selector
After parsing, every unique key across all rows is shown as a checkbox. Select exactly the fields you need and deselect the rest. This is especially useful with large API responses that contain dozens of fields you don't need in the exported spreadsheet. The live preview updates instantly as you check and uncheck columns.
Array Field Handling
When a field contains an array — such as tags: ["admin", "user"] — this JSON to CSV
converter offers two options: join all values into a single cell as a comma-separated string
("admin, user"), or expand the array so each element gets its own row. The expand option is
useful for one-to-many relationships where each tag or item needs to be on a separate line.
Who Uses a JSON to CSV Converter?
A JSON to CSV converter is essential in many developer and analyst workflows:
- Exporting API responses to Excel or Google Sheets for analysis
- Preparing JSON database exports for import into SQL or BI tools
- Converting NoSQL document exports (MongoDB, Firestore) to tabular format
- Sharing structured data with non-technical team members who use spreadsheets
- Debugging large JSON datasets by exploring them in a grid view
This JSON to CSV converter runs entirely client-side — your data is never uploaded to any server, never logged, and never stored. Convert as many files as you need at no cost.
Frequently Asked Questions
What is a JSON to CSV converter?
A JSON to CSV converter is a tool that transforms JSON data — typically an array of objects — into a comma-separated values file that can be opened in Excel, Google Sheets, or any spreadsheet application. This tool also handles nested JSON objects by flattening them into dot-notation column names automatically.
How do I convert JSON to CSV?
Paste your JSON into the input area and click Parse JSON. The tool detects all keys — including nested ones — and shows them as selectable checkboxes. Choose which columns to include, optionally set a delimiter (comma, semicolon, or tab), and click Download CSV or Copy to clipboard. The live preview shows the first five rows before you export.
Can this JSON to CSV converter handle nested JSON?
Yes. This JSON to CSV converter automatically flattens nested objects using dot notation. A field like user.address.city becomes its own column. Nested keys are highlighted in the column selector so you can identify them easily and include or exclude individual nested fields.
How do I open a CSV file in Excel after converting?
Enable the UTF-8 BOM toggle before downloading to ensure Excel reads special characters correctly. Then open the downloaded .csv file in Excel via File > Open. If columns are not split automatically, use the Data > Text to Columns wizard and choose Comma as the delimiter.
Is this JSON to CSV converter free to use?
Yes, completely free with no account required. All conversion happens locally in your browser — no JSON data is uploaded to any server. You can convert as many files as you like at no cost.