Free online JSON to CSV converter. Instantly convert JSON arrays and objects to CSV format with customizable delimiters (comma, tab, semicolon), header rows, and nested object flattening with dot notation. 100% browser-based — your data never leaves your device.
100% browser-based — your data never leaves your device
Convert JSON arrays to CSV format with customizable delimiter, headers, and nested object flattening.
Copy your JSON array of objects and paste it into the input area.
Choose delimiter (comma, tab, semicolon), toggle headers, and enable nested flattening.
Click Convert to CSV. Copy the output or download as a .csv file.
Drop a file here or click to browse
Ctrl+Enter to convert to csv
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JSON to CSV Converter is a free online json tool that convert json arrays to csv format with customizable delimiter, headers, and nested object flattening. It works entirely in your browser — no downloads, no installations, and no server uploads required. backend developers, frontend engineers, DevOps engineers use JSON to CSV Converter when they need a fast, privacy-respecting way to process json data without installing additional software. It supports capabilities such as nested object flattening, rfc 4180 compliance, multiple delimiters. Additional features include local only. Common use cases include exporting json api responses to csv for spreadsheet analysis, converting database query results from json to csv for reporting, transforming configuration data into tabular format for non-technical stakeholders. All processing happens locally using modern browser APIs, which means your data never leaves your device. This makes JSON to CSV Converter ideal for working with sensitive data, proprietary code, or any situation where privacy matters.
JSON to CSV Converter is a free online json tool that helps you convert json arrays to csv format with customizable delimiter, headers, and nested object flattening. Key capabilities include nested object flattening, rfc 4180 compliance, multiple delimiters. All processing is done locally in your browser — no data is uploaded, stored, or shared with any server. There are no sign-ups, no file size limits, and no hidden charges. It is commonly used to exporting json api responses to csv for spreadsheet analysis.
Copy your JSON array of objects and paste it into the input area.
Choose delimiter (comma, tab, semicolon), toggle headers, and enable nested flattening.
Click Convert to CSV. Copy the output or download as a .csv file.
| Category | Details |
|---|---|
| Input Limits | Maximum file size: Browser memory bound (~2 GB) |
| Nesting depth: Unlimited (browser stack limit) | |
| Supported Formats | JSON, JSONC (with comments), JSON5 (extended syntax) |
| Browser Engine |
|
All operations run entirely in your browser using built-in JSON APIs. No server uploads, no data storage, and no third-party requests.
JSON to CSV Converter is ideal when you need to exporting json api responses to csv for spreadsheet analysis without installing software or uploading data to a server. Since everything runs in your browser, there is no setup time and no risk of your data being stored on external servers. For for persistent editing environments with linting, consider using VS Code with JSON extension. For for server-side JSON processing in scripts, jq (command-line) may be a better fit. JSON to CSV Converter fills the gap between heavyweight desktop tools and insecure online services that require uploading your data.
No. JSON to CSV Converter processes everything entirely in your browser using JavaScript. Nothing you type, paste, or upload is ever transmitted to any server. Your data never leaves your device.
Arrays of objects ({...}, {...}, ...) are ideal. Single objects are wrapped as single-row CSV. Deeply nested objects are flattened with dot notation in headers.
Yes. Nested objects are flattened using dot notation (e.g., address.city). Arrays within objects are serialized as JSON strings in the CSV cell.
Automatically flattens nested objects with dot-notation keys for clean CSV output.
Properly escapes commas, quotes, and newlines in CSV fields per the RFC 4180 standard.
Supports comma, tab, and semicolon delimiters for compatibility with different spreadsheet applications.
All conversion happens in your browser. Your data never leaves your device.
JSON to CSV Converter is useful in a variety of scenarios across different workflows:
Exporting JSON API responses to CSV for spreadsheet analysis
Converting database query results from JSON to CSV for reporting
Transforming configuration data into tabular format for non-technical stakeholders
Enable nested flattening to convert nested JSON objects into dot-notation columns (e.g., address.city). Without flattening, nested objects are serialized as JSON strings.
Use comma for standard CSV, tab for TSV (for Excel), and semicolon for European locales where comma is the decimal separator.
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