Developer Tools

JSON ↔ CSV Converter

Convert JSON arrays to CSV spreadsheets and CSV back to JSON. Free, private, browser-based.

JSON Input (array of objects)

How to Use

1. Select the direction: JSON → CSV or CSV → JSON.
2. Paste your data into the input area. JSON must be an array of objects with consistent keys.
3. Click Convert. The output appears below.
4. Click Copy to copy the result to the clipboard.

About This Tool

JSON (JavaScript Object Notation) and CSV (Comma-Separated Values) are the two most common data interchange formats in software development. JSON is used heavily in APIs, configuration files, and NoSQL databases. CSV is used in spreadsheets, data exports, and analytics workflows.

Converting between them is a daily task for developers, data analysts, and business users. This tool handles the common case: a JSON array of objects (where every object has the same keys) is converted to a CSV where the keys become column headers and each object becomes a row.

The converter correctly handles edge cases such as values containing commas and values containing double quotes (which are escaped by doubling them per the RFC 4180 standard).

All processing runs entirely in your browser using pure JavaScript. Your data is never sent to a server — it stays completely private.

You may also find our JSON Formatter, JSON Diff, and YAML to JSON helpful.

Frequently Asked Questions

What JSON format is supported for CSV conversion?

The tool expects a JSON array of objects, where each object represents a row and each key represents a column. Nested objects are not supported and will be converted to their string representation.

What CSV format is supported for JSON conversion?

The tool expects standard CSV with a header row. Values containing commas should be wrapped in double quotes. The first row is used as the property names for JSON objects.

Can I download the output?

You can copy the output to clipboard and paste it into a .csv or .json file. Direct download functionality may be added in a future update.

Does this handle special characters in CSV?

The tool handles basic CSV including quoted fields with commas. For complex CSV with newlines inside fields or other edge cases, consider using a dedicated CSV parser library.

Does this tool send my data anywhere?

No. All conversion happens in your browser using JavaScript. Your data never leaves your device.

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