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JSON to CSV Converter
Paste a JSON array and download a clean CSV file – column headers auto-detected from the keys, nested values flattened, and the file ready to open in Excel or Google Sheets.
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JSON to CSV Converter – ToolPremier

Convert JSON arrays to CSV · auto-detect headers · custom delimiter · download .csv · client-side only

How it works
Convert in three steps

1. Paste your JSON array

Drop in a JSON array of objects - an API response, a database export, or any structured list. Each object in the array becomes a row in the CSV.

2. Configure column options

Choose which keys to include as columns, set the delimiter (comma, tab, semicolon), and choose how nested objects should be handled.

3. Download or copy the CSV

Get a properly formatted CSV file ready to open in Excel, Google Sheets, or pass to a data pipeline.

FAQ
Common questions
JSON arrays of flat objects work best – each object in the array should have the same keys, and values should be simple types (strings, numbers, booleans). Deeply nested objects or arrays within arrays require flattening decisions that may not match your data model. For complex nested JSON, consider flattening the structure manually before converting or using the nested key dot-notation option.
Nested objects can be flattened using dot notation – a key like address.city becomes a column header, with the value from the nested address.city property. Arrays within objects (like a list of tags) are typically serialized as a JSON string within the cell, since CSV cells cannot represent arrays natively.
Use commas for standard CSV files compatible with most tools. Use semicolons if you are targeting European Excel installs, which default to semicolons as the list separator due to comma being used as the decimal separator in many European locales. Use tabs (TSV) for data containing commas in the values – tab-separated values avoid quoting issues with comma-heavy content.
Yes, with proper encoding. Values containing commas are automatically wrapped in double quotes. Values containing double quotes have them escaped by doubling. The output includes UTF-8 BOM encoding by default, which prevents character encoding issues when opening in Excel on Windows – especially for data containing non-ASCII characters.
Keep going
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Format and validate the JSON array before converting to CSV.

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YAML to JSON

Convert YAML config data to JSON before converting to CSV.

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About the JSON to CSV Converter
API responses, database exports, and data pipeline outputs are commonly delivered as JSON arrays – but data analysis, reporting, and spreadsheet work usually happen in CSV. Manually converting JSON to CSV means writing a script, setting up a notebook, or using a full-featured data tool just to get tabular data into a spreadsheet. This converter handles the most common case directly in your browser: paste a JSON array of objects, get a CSV with auto-detected column headers, properly quoted values, and correct encoding for Excel and Google Sheets. It covers nested object flattening and delimiter options for the cases where the defaults do not fit.
Benefits
  • Auto-detects column headers from JSON object keys - no manual header configuration needed.
  • Nested object flattening with dot notation - address.city becomes its own column.
  • Multiple delimiter options - comma, semicolon, and tab for different tool compatibility.
  • UTF-8 BOM encoding - prevents character corruption when opening in Excel on Windows.
Privacy
All conversion runs in your browser. JSON data – including personally identifiable or sensitive records – is never transmitted to any server.