The JSON to CSV Converter transforms JSON arrays into clean, downloadable CSV files instantly. Whether you're exporting API data to a spreadsheet, preparing datasets for analysis, or generating reports, this tool handles the conversion with automatic header extraction and proper CSV escaping.
Step-by-Step
Paste your JSON array — Enter a JSON array of objects into the input panel (e.g., [{"name": "Alice", "age": 30}, {"name": "Bob", "age": 25}]).
Configure options — Choose your delimiter (comma, semicolon, or tab), whether to include headers, and how to handle nested objects.
Click Convert — The tool extracts all unique keys as column headers and maps each object to a CSV row.
Preview the result — Review the formatted CSV output in the preview panel with proper column alignment.
Download or copy — Click Download to save as a .csv file, or use the clipboard button to copy the output.
Features
Automatic Header Extraction — All unique keys across every object in the array are collected and used as CSV column headers, even if some objects have missing fields.
Nested Object Flattening — Nested objects are flattened using dot notation (e.g., address.city), so no data is lost during conversion.
Proper CSV Escaping — Values containing commas, quotes, or newlines are automatically wrapped in double quotes and properly escaped per RFC 4180.
Custom Delimiters — Choose between comma, semicolon, or tab as your field separator to match your locale or tool requirements.
Null and Undefined Handling — Missing or null values produce empty cells rather than the literal text "null" or "undefined".
Instant Download — Download the generated CSV file with a single click, ready to open in Excel, Google Sheets, or any spreadsheet application.
Common Use Cases
API Data Export — Convert JSON API responses into CSV for stakeholders who prefer spreadsheet-based analysis.
Database Reporting — Transform query results from MongoDB or PostgreSQL JSON output into CSV for business reports.
Data Pipeline Prep — Prepare JSON datasets as CSV for import into legacy systems, BI tools, or data warehouses that require tabular formats.
Log Analysis — Convert structured JSON logs into CSV for easier filtering and pivot table analysis in spreadsheets.
Migration Tasks — Export data from JSON-based systems and import into CSV-based tools or databases.
Why Use This Tool
Converting JSON to CSV by hand is error-prone — you risk misaligned columns, broken escaping, and lost nested data. This tool automates all of that with RFC-compliant output and smart flattening. It runs entirely in your browser, so your data stays private. No signup, no rate limits, and no server-side processing.
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