JSON to CSV Converter
Convert nested JSON arrays to CSV format for Excel or Google Sheets. flattens objects and handles headers automatically.
How it works
A quick explanation of what this tool does, and when it's useful.
Data formats run exactly opposite to each other: APIs speak JSON (nested, tree-like), while business analysts favor CSV (flat, rows and columns). This tool is such a translation layer, flattening complex data arrays into spreadsheets ready for Excel.
The Problem: Hierarchical vs. Flat Data
JSON represents data as trees. An object can contain a list, which contains objects. Spreadsheets are 2-dimensional grids. Converting between them requires flattening.
{"user": {"name": "Alice"}}, standard flattening creates a column named user.name with the value "Alice". This tool handles this automatically for simple nested objects.
How This Tool Works
Our converter focuses on the most common use case: an Array of Objects.
- Header Extraction: It scans every object in your array, not just the first one. If the 50th item has a unique field "error_log", the tool detects it.
- Normalization: It ensures every row has a value for every header column.
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Escaping: If your data contains a comma, a newline, or a double quote, it breaks the CSV structure. The tool automatically wraps these fields in quotes (e.g.,
"London, UK") to preserve integrity.
Real-World Use Cases
- Reporting: You query your MongoDB database and get a JSON dump of users. Your Boss wants a report. You use this tool to turn that JSON into a CSV and open it in Excel to make charts.
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Data Migration: You are moving data from a NoSQL system (Firebase) to a SQL database (PostgreSQL). You export JSON, convert to CSV, and use the SQL
COPYorIMPORTcommand.
Frequently asked questions
Short answers to common questions about json to csv converter.
How are nested objects handled?+
This tool attempts to flatten simple nested objects. Deeply nested structures will be stringified to fit into a single CSV cell.
Can I open the result in Excel?+
Yes. The output is a standard CSV file which can be opened natively by Excel, Numbers, or Google Sheets.