JSON to CSV Converter
Convert nested JSON arrays to CSV format for Excel or Google Sheets. flattens objects and handles headers automatically.
Capabilities
✓ Local Processing
Data never matches server
✓ Large Files
Optimized for 5MB+ text
✓ Privacy First
No logs, no tracking
✓ Standard Compliant
Strict RFC adherence
How It Works
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.
💡 How Flattening Works
If you have
{"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.
⚠️ Limitation: Deep Nesting
If your JSON involves arrays inside arrays (e.g., a user has a list of 5 addresses), flattening becomes messy. In these cases, the tool may stringify the inner array into a single cell content, which is usually the safest option for Excel.