JSON to CSV Converter
Convert JSON arrays to clean CSV or CSV back to structured JSON with live real-time preview.
🔒 100% Client-Side Processing • Your data never leaves your browser.
Live converted output will appear here
Type or paste in the input pane, or upload a file to convert.
How to Convert JSON to CSV
Convert your API responses, datasets, and configuration exports to spreadsheet-ready CSV in four simple steps.
Paste or Upload
Paste your JSON array into the editor or upload a .json file directly from your computer.
Configure Options
Choose your delimiter (comma, semicolon, tab, pipe), quote style, whether to flatten nested objects, and header inclusion.
Instant Conversion
The parser validates syntax in real-time and renders clean, delimited CSV directly in your browser.
Copy or Download
Copy the formatted CSV output with one click, or download it as a ready-to-use .csv file for Excel or Google Sheets.
Instant JSON to Spreadsheet Conversion
Developers and data analysts regularly export API payloads, database records, and configuration data as JSON. Importing this into Excel, Google Sheets, or BI tools requires conversion to CSV — a step that traditionally meant installing desktop software or uploading sensitive data to third-party servers.
ToolLab's JSON to CSV Converter runs 100% locally inside your web browser. Using native JavaScript, your records are flattened, formatted, and converted with zero latency, zero cloud storage, and complete privacy.
Key Capabilities
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Bi-Directional Conversion: Instantly toggle between JSON to CSV and CSV to JSON with the one-click mode buttons.
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Nested Object Flattening: Automatically flatten deeply nested JSON objects into dot-notation columns suitable for flat CSV rows.
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Custom Delimiters: Choose comma, semicolon, tab, or pipe delimiters to match your target spreadsheet or database import format.
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Smart Type Casting: When converting CSV to JSON, numeric values, booleans, and nulls are automatically cast to native JSON types.
Frequently Asked Questions
Yes, absolutely. All conversion, flattening, and parsing happen 100% locally inside your web browser. Your data is never uploaded to any server or third-party service.
Yes! You can convert JSON to CSV or switch to CSV to JSON mode with dedicated mode buttons, allowing seamless two-way conversion directly in your browser.
When 'Flatten Nested' is enabled, nested objects are expanded into dot-notation columns (e.g. address.city, address.zip). When disabled, nested values are serialized as JSON strings in the CSV cell.
You can choose comma (standard CSV), semicolon (common in European locales), tab (TSV format), or pipe (|) as your field delimiter for both import and export.
Yes. Numeric values like 4999, booleans like true/false, and null are automatically cast to their native JSON types rather than being left as plain strings.
Yes, you can upload .json or .csv files using the file picker, drag and drop files directly onto the editor, or paste content from your clipboard. The tool auto-detects the mode based on file type.