JSON to CSV Converter
Flatten JSON arrays, API payloads, and NoSQL documents into downloadable CSV or Excel spreadsheets with automatic column alignment.
Drag & drop your JSON file, or browse
Accepts .json files or API outputs up to 50 MB
What is a JSON to CSV Converter?
A JSON to CSV converter is a data restructuring utility designed to flatten hierarchical JavaScript Object Notation (JSON) structures into flat, two-dimensional comma-separated tables. It maps nested object keys using standard dot-delimited paths, reconciles heterogeneous record keys into uniform columns, and outputs clean tabular data ready for spreadsheets and databases.
How to convert JSON to CSV online
- Supply your JSON payload: Upload a
.jsonfile or paste an array of objects into the source textarea. - Review delimiter settings: Choose between comma, semicolon, tab, or pipe delimiters based on your target spreadsheet software.
- Inspect the flattened columns: Confirm that nested paths (like
user.profile.name) are mapped properly in the live table grid. - Download CSV or Excel: Click Download .csv for text pipelines or Download .xlsx for direct spreadsheet editing.
Handling nested objects in tabular formats
| JSON Structure | Flattened CSV Column | Sample Cell Value |
|---|---|---|
{ "user": { "email": "a@b.com" } } | user.email | a@b.com |
{ "tags": ["admin", "staff"] } | tags | ["admin", "staff"] |
{ "geo": { "lat": 40.71 } } | geo.lat | 40.71 |
Need to turn tabular data back into developer JSON? Try our CSV to JSON Converter or inspect columns with our Spreadsheet Table Viewer.
Frequently asked questions
How does it handle nested JSON objects and arrays?
Nested object keys are flattened using dot notation (for example, {"address": {"city": "New York"}} becomes an "address.city" column). Array fields are serialized as compact JSON strings inside the spreadsheet cell.
Can I download the result as an Excel (.xlsx) file as well as CSV?
Yes. You can export directly as a standard comma-separated (.csv) file or download an OpenXML (.xlsx) Microsoft Excel spreadsheet with formatted headers.
What if my JSON records have different keys or missing properties?
The flattener scans across every object in your JSON array to construct a comprehensive master header list. Any object missing a specific key is automatically padded with an empty cell, ensuring clean rectangular alignment.
Is my JSON data uploaded or logged anywhere?
Never. All parsing, key traversal, and CSV generation occur purely inside your browser client using JavaScript. No payloads are sent to any external server.
Can I paste a single JSON object instead of an array?
Yes. If you provide a single JSON object, the tool treats it as a single row containing all top-level and nested properties.