JSON to CSV Converter
Convert JSON arrays to CSV format. Download as .csv or copy to clipboard. Handles nested data.
When You Need CSV Instead of JSON
JSON is the language of APIs and modern web apps. CSV is the language of spreadsheets, data analysis, and legacy systems. The reality is that most business people live in Excel and Google Sheets — they can't open a JSON file and make sense of it, but hand them a CSV and they're instantly productive.
Think of JSON as a structured filing cabinet with labelled folders inside folders. CSV is a flat table — rows and columns, like a spreadsheet. Converting between them means flattening that nested structure into something tabular. Simple objects convert cleanly. Deeply nested JSON needs some decisions about how to represent nested data in flat columns.
This tool handles the conversion client-side — your data stays in your browser. Paste JSON, get CSV. No upload, no server, no risk.
JSON vs CSV Comparison
| Feature | JSON | CSV |
|---|---|---|
| Structure | Nested, hierarchical | Flat, tabular |
| Data types | String, number, boolean, null, array, object | Everything is a string |
| Readability | Machine-friendly, decent for developers | Human-friendly, opens in any spreadsheet |
| File size | Larger (keys repeated per object) | Smaller (headers only once) |
| Nesting support | Unlimited nesting depth | None — flat rows only |
| Standard spec | RFC 8259 (strict) | RFC 4180 (loosely followed) |
| Best for | APIs, config files, NoSQL databases | Spreadsheets, data import/export, reporting |
What this means for you: Use JSON when your data has relationships and nesting. Use CSV when you need to share data with non-technical people or import into spreadsheet software.
Handling Edge Cases
Nested Objects
When a JSON value is an object, the converter flattens it using dot notation:address.city becomes a column header. This preserves the relationship without losing data.
Arrays in Values
If a field contains an array like ["a","b","c"], it gets stringified in the CSV cell. For proper tabular representation, consider restructuring the JSON first.
Commas in Values
CSV uses commas as delimiters, so values containing commas get wrapped in double quotes automatically. A value like "London, UK" becomes "London, UK" in the output.
Missing Fields
Not every JSON object needs the same keys. If object #3 has a field that objects #1 and #2 don't, those cells are simply left empty in the CSV. No data is lost.
Common Use Cases
API data exports are the most common scenario — you've pulled user records, transaction logs, or analytics from a REST API and need to share it with a team that works in Excel. E-commerce platforms regularly export order data as JSON that needs CSV conversion for accounting software. Data migration between systems often requires JSON→CSV as an intermediate step.
Database exports from MongoDB and Firebase come as JSON by default. Converting to CSV lets you use standard data analysis tools like Excel, Google Sheets, or Python's pandas library for quick analysis without writing parsing code.
Handling Tricky JSON Structures
Nested Objects
JSON like {"address": {"city": "London"}} needs flattening for CSV. Most tools create columns like address.city. If your JSON is deeply nested (3+ levels), consider flattening it with jq first.
Arrays in Values
A field like "tags": ["red", "blue"] doesn't map cleanly to a single CSV cell. Common solutions: join with a delimiter (red|blue), create separate rows, or create numbered columns (tag_1, tag_2).
Missing Fields
Unlike databases, JSON objects can have different keys in each record. When converting, missing fields become empty CSV cells. This is normal — just make sure your spreadsheet formula handles blanks gracefully.
Special Characters
Commas, quotes, and newlines inside JSON values need proper CSV escaping. Fields containing commas must be wrapped in double quotes. Fields containing quotes need the quotes doubled (""). This tool handles all of that automatically.
Related Tools
CSV to JSON
Convert in the other direction — CSV back to JSON.
JSON Formatter
Pretty-print your JSON before converting to CSV.
XML Formatter
Format XML data — another common API response format.
Base64 Encoder/Decoder
Decode Base64-encoded data fields before conversion.
Text Diff Checker
Compare JSON and CSV outputs side by side.
Word Counter
Check the size of your converted CSV data.
How to use this tool
Paste a JSON array of objects into the input area
Click Convert to CSV to generate the tabular output
Copy the result to clipboard or download as a .csv file
Common uses
- Exporting API response data to Excel or Google Sheets
- Converting MongoDB exports to spreadsheet format
- Preparing JSON data for import into legacy database systems
- Sharing structured data with non-technical team members
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