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JSON to CSV

Convert JSON data to CSV format online free

What is the JSON to CSV?

The json to csv works like this: it flattens arrays of JSON objects into CSV with headers from the union of keys, handling nested objects via dot notation. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.

How to use the JSON to CSV

1. Paste the input (code, data or query).
2. Run the operation - formatting and validation are instant.
3. Read any validation message before trusting the output.
4. Copy the result into your project.

Features

• Instant client-side formatting and validation
• No telemetry on your data
• Copy-ready output with proper escaping

Common mistakes to avoid

• Using the wrong input dialect (JSON vs JSON5, cron 5 vs 6 fields)
• Copying output without checking escaping

Examples

Input	Result
[{"name":"Ada","age":36},{"name":"Alan","age":41}]	name,age Ada,36 Alan,41

Best used for

• Getting a reliable answer for json to csv without installing an app
• One-off tasks done in under a minute from any device
• Checking results before committing them to something important
• Working on a phone where desktop software is unavailable

Privacy

All parsing and transformation happens locally in this tab - your code and data are not sent anywhere.

Frequently asked questions

What happens to nested objects?

They flatten to dotted paths: {"a":{"b":1}} becomes column a.b. Deeply varied structures produce sparse columns.

How are nested objects handled?

They are flattened with dot notation (user.name becomes the column "user.name") so no data is lost, while arrays inside objects become JSON-encoded cell values.

What happens when records have different keys?

The CSV header is the union of every key found, and missing cells are simply empty - the shape spreadsheets expect from real-world exports.

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