Convert JSON to CSV or CSV to JSON online. Flattens nested objects & arrays, unions all keys, supports comma/semicolon/tab/pipe delimiters and type inference, free, live, runs locally.
The JSON to CSV Converter transforms JSON into spreadsheet-ready CSV and back again, intelligently flattening nested objects so the output opens cleanly in Excel. It handles large files entirely in your browser, with nothing uploaded.
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Paste JSON to get clean CSV, or paste CSV to get structured JSON, with the tool handling nested fields and headers so you don't have to reformat data by hand. It's the fastest way to move data between APIs, spreadsheets, and databases.
Add your JSON (or CSV) data.
Choose JSON→CSV or CSV→JSON.
Nested objects are flattened into clean columns automatically.
Save an Excel-ready CSV or a formatted JSON file.
Developers and analysts constantly bridge the gap between JSON from APIs and CSV for spreadsheets, this converter removes the tedious, error-prone manual step. Everything is processed locally in your browser, so even sensitive datasets never leave your machine.
Paste your JSON array or upload your JSON file. The tool flattens it into a CSV format and lets you download the Excel-compatible CSV file instantly, no signup required.
Yes. The converter automatically flattens nested objects using dot notation (e.g., user.name becomes a column header). Arrays within objects are handled based on your configuration.
CSV files open in Excel and Google Sheets for easy data analysis, filtering, and charting. JSON is great for APIs, but CSV is better for non-technical users, data reports, and bulk imports into systems like Salesforce or HubSpot.
Yes. The tool processes data locally in your browser and can handle large JSON arrays efficiently. For very large files (100MB+), performance depends on your device's memory.
Yes. The CSV is UTF-8 encoded with proper comma separation, making it compatible with Excel, Google Sheets, LibreOffice Calc, and any other spreadsheet application.
Yes. The converter is bidirectional, switch to CSV→JSON mode, paste your CSV data, and it generates a JSON array where each row becomes an object with column headers as keys. Useful for importing spreadsheet data back into APIs or JavaScript applications.
Paste a JSON array of objects and the tool produces CSV with a header row, ready to open in Excel or Sheets. It runs in your browser, so your data is never uploaded.
Nested objects are flattened using dot notation (for example address.city becomes a column), so complex JSON still becomes clean tabular CSV.
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