Convert JSON to CSV
or Excel Instantly
Upload a JSON file to flatten nested data into clean rows and columns. Preview, then download as CSV or .xlsx — free, private, no sign-up needed.
How to Convert JSON to CSV
Understanding JSON to CSV Conversion
JSON (JavaScript Object Notation) is the most common data exchange format on the web. APIs, databases, configuration files, and modern applications all use JSON to store and transfer structured data. But when you need to analyze, sort, filter, or share that data with non-technical people, a spreadsheet is usually more practical — and that means converting to CSV or Excel.
The challenge is that JSON supports nested structures (objects inside objects, arrays inside arrays) while CSV is strictly flat — each row has the same columns, and each cell holds a single value. This converter bridges that gap by flattening nested JSON into tabular format automatically.
How Flattening Works
When the converter encounters a nested object like {"user": {"name": "Alice", "address": {"city": "NYC"}}}, it creates columns using dot notation: user.name and user.address.city. Arrays of primitive values (like tags: ["python", "javascript"]) are joined into a single cell with commas. This approach preserves all data while making it compatible with the row-and-column structure of spreadsheets.
Common Use Cases
API data analysis: You've pulled data from a REST API and need to analyze it in a spreadsheet. Drop the JSON response here and get a clean CSV for Google Sheets or Excel.
Database exports: MongoDB, Firebase, and other NoSQL databases export data as JSON. Converting to CSV makes it easy to review, share with stakeholders, or import into relational databases.
Log file analysis: Structured logging systems produce JSON-formatted log files. Converting to CSV lets you filter and sort events in a spreadsheet, spot patterns, and create charts.
Configuration auditing: When you need to compare or review JSON configuration files, converting to a spreadsheet makes side-by-side comparison much easier than reading raw JSON.