Convert JSON to CSV Online
Turning JSON data into a comma-separated values file is one of the most common data-wrangling tasks developers face. Whether you are exporting an API response for a product manager who lives in Google Sheets, feeding data into a legacy import pipeline, or simply trying to eyeball records in a tabular layout, a reliable JSON-to-CSV converter saves real time.
JConvert flattens nested objects with dot notation (e.g. address.city), keeps array values intact, and runs entirely in your browser so sensitive payloads never touch a server.
Paste your JSON, hit Convert, and download the CSV — or copy it straight to your clipboard.
What this converter does
The converter parses your JSON input — an array of objects or a single object — and maps each key to a CSV column. Nested objects are flattened using dot notation so {"user":{"name":"Jo"}} becomes a column header user.name. Arrays that cannot be further flattened are serialized as JSON strings inside the cell.
The output uses commas as the default delimiter and wraps values containing special characters in double quotes, following RFC 4180.
Common use cases
- Exporting REST API responses into spreadsheet-friendly formats
- Preparing data for database bulk-import tools that expect CSV
- Sharing JSON datasets with non-technical stakeholders
- Feeding data into BI tools like Tableau, Power BI, or Looker
- Converting MongoDB query results for analysis in Excel or Google Sheets
How to use JConvert
- Paste or upload your JSON data into the input editor on the converter page.
- Click Convert — the tool auto-detects your input format and produces CSV output instantly.
- Download or copy the result. You can also drag-and-drop files for quick conversion.
Notes and limitations
- Deeply nested objects are flattened with dot notation; there is no depth limit.
- If your JSON contains arrays of mixed types, array values are stringified as JSON in the CSV cell.
- The first object in an array determines the set of columns; additional keys in later objects are appended.
- A single top-level object is treated as one row with its keys as column headers.
- Maximum input size is 10 MB.
Privacy and security
JConvert processes everything inside your browser using client-side JavaScript. Your data is never uploaded to any server. No cookies track your conversions, and the source code is fully auditable. This makes it safe for converting internal company data, API keys embedded in fixtures, or any payload you would rather keep private.
Example
JSON input
[
{ "name": "Alice", "age": 30, "city": "Paris" },
{ "name": "Bob", "age": 25, "city": "London" }
]CSV output
name,age,city
Alice,30,Paris
Bob,25,LondonReady to convert your data?
Open JSON to CSV ConverterFrequently Asked Questions
- Can I convert nested JSON to CSV?
- Yes. Nested objects are automatically flattened using dot notation. For example, {"address":{"city":"Paris"}} becomes a column named address.city with the value Paris.
- What happens with JSON arrays inside objects?
- Arrays of primitives are joined into a single cell as a JSON string. Arrays of objects are flattened into separate columns where possible.
- Is there a file size limit?
- The converter handles inputs up to 10 MB. For very large files, processing happens with a progress indicator so you can track the conversion.
- Does my data leave my browser?
- No. All processing is 100% client-side. Your JSON is never sent to any server.
- Can I convert CSV back to JSON?
- Absolutely. JConvert also supports CSV-to-JSON conversion with auto-delimiter detection. See the CSV to JSON tool.