Convert JSON arrays to CSV format with customizable options
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Flatten complex JSON data into readable spreadsheets. Convert API responses to Excel-friendly CSV formats with smart nested-data handling.
Learn more about this tool and related topics in our blog.
Practical guide to converting between JSON, CSV, XML, and YAML. Plus how to format messy JSON that makes your eyes bleed.
Privacy isn't a perk, it's a requirement. See why top developers are ditching cloud converters for local-first browser utilities.
Stop uploading sensitive spreadsheets to the cloud. Learn how to convert CSV to JSON safely in your browser while preserving data privacy.
This tool uses client-side WebAssembly to ensure your data never touches a server. Secure, fast, and 100% private by design.
Paste your JSON code into the input box.
The tool will automatically parse and convert it to CSV.
Check the preview to ensure the columns look correct.
Click 'Download CSV' to save the file to your computer.
Open the file in Excel, Numbers, or Google Sheets.
Convert array of user objects to spreadsheet format
[{"name":"Alice","age":30,"city":"NYC"},{"name":"Bob","age":25,"city":"LA"}]name,age,city\nAlice,30,NYC\nBob,25,LA
Flatten nested address object using dot notation
[{"user":"John","address":{"street":"123 Main","city":"Boston"}}]user,address.street,address.city\nJohn,123 Main,Boston
Convert API data with mixed types to CSV
[{" id":1,"product":"Laptop","price":999.99,"inStock":true}]id,product,price,inStock\n1,Laptop,999.99,true
Export REST API response data to Excel for non-technical stakeholders.
Convert MongoDB or NoSQL query results to spreadsheet format.
Transform product catalog JSON into CSV for bulk editing.
Convert JSON analytics data for charting in Excel or Google Sheets.
JSON objects can be nested arbitrarily deep. CSV is flat (rows and columns). Flattening process:\n\n**Input**: {user: {name: \"John\", address: {city: \"NYC\"}}}\n**Flattened**: user.name, user.address.city as columns\n**CSV**: Row with values: \"John\", \"NYC\"\n\nDot notation preserves the nesting structure in column names. Deep nesting (5+ levels) creates unwieldy column headers.
Arrays in JSON don't map directly to CSV structure:\n\n**Simple arrays**: Serialized as JSON string in cell\n**Array of objects**: Each becomes a row (if at root level)\n**Nested arrays**: Become JSON strings\n\nExample: {tags: [\"red\", \"blue\"]} → Column 'tags' with value '[\"red\",\"blue\"]' as text.
CSV is text-only format. All JSON data types convert to strings:\n\n- Numbers: \"123\" (text)\n- Booleans: \"true\"/\"false\" (text)\n- Null: \"null\" or empty cell\n- Dates: ISO string (\"2024-01-15T...\")\n\nExcel may auto-detect and convert some types when opening, but this isn't guaranteed.
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Learn more about this tool and related topics in our blog.
Practical guide to converting between JSON, CSV, XML, and YAML. Plus how to format messy JSON that makes your eyes bleed.
Privacy isn't a perk, it's a requirement. See why top developers are ditching cloud converters for local-first browser utilities.
Stop uploading sensitive spreadsheets to the cloud. Learn how to convert CSV to JSON safely in your browser while preserving data privacy.