JSON to CSV guide
JSON to CSV Description
Effortlessly convert JSON arrays into CSV format for use in spreadsheet applications like Excel or Google Sheets. Features interactive table previews and smart field flattening.
Features
Smart Flattening: Automatically converts nested JSON objects into flat CSV columns using dot notation.
Field Selection: Toggle specific fields on/off to customize your CSV output.
Interactive Table: Preview the result in an Excel-like grid before downloading.
Custom Delimiters: Supports comma, semicolon, and tab separators.
How to Use
1
Paste your JSON array into the top editor.
2
Click the Example (Demo) button to see a sample dataset of user information.
3
Adjust the CSV delimiter and select the fields you want to include in the settings.
4
Click Download CSV or copy the result from the text view.
FAQ
Q. What happens to arrays inside JSON?
They are typically stringified into the cell to preserve their content.
Q. Does it support large files?
It works best for data sets up to a few megabytes; very large JSON blobs might take longer to process.
Use Cases
- Data Export: Converting API responses into a format that non-developers can analyze in Excel.
- Migration: Moving data from a JSON-based database (like MongoDB) to a relational system or spreadsheet.
- Reporting: Generating quick summary tables from structured data blobs.
Technical Deep Dive
The tool traverses the JSON structure to find all unique keys. For nested objects, it flattens the path (e.g., user: { name: 'John' } becomes user.name). It then maps each record to the identified column index.
Limitations
- Requires the input to be an array of objects for optimal conversion. Single objects will be treated as a single row.
3M
Reviewed by Tool3M Editorial Team
Updated April 25, 2026