JSON/CSV Converter

Convert between JSON and CSV formats
This free online json/csv converter runs in your browser and is part of our Converters collection.

🔄 JSON/CSV Converter

Convert between JSON and CSV formats

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Instant In-Browser Execution Runs locally in JavaScript without wait times or server delays.
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100% Privacy & Security Your inputs and files are never stored or logged on remote servers.
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Cross-Device Responsive Fully optimized for mobile smartphones, tablets, and desktop displays.
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100% Free Forever No subscription fees, no signups, and no software installations.

How to Use the Online JSON/CSV Converter

1 Select Direction (JSON to CSV or CSV to JSON)

Choose whether you are converting structured JSON objects into a CSV table, or converting CSV data into a JSON array.

2 Paste Input Data

Paste your JSON array or raw comma/tab-separated table into the editor, or upload a `.json` or `.csv` file.

3 Configure Delimiter & Headers

Select comma (`,`), semicolon (`;`), or tab (`\t`) delimiters, and toggle whether the first line contains column headers.

4 Convert & Download File

Click "Convert" to process the data, preview the table layout, and download as `.csv` or `.json`.

Frequently Asked Questions

Common questions about using this free online json/csv converter.

How does the converter handle nested JSON objects and arrays? ▾
Nested object properties are flattened using dot notation keys (e.g. `user.address.city`), and arrays are serialized into formatted strings, ensuring no data loss when creating 2D CSV tables.
What if some JSON objects have different keys or missing properties? ▾
The converter scans all objects in the array to construct a unified superset of column headers, inserting empty strings for objects that lack specific keys.
Does this tool properly handle commas and quotation marks inside CSV text? ▾
Yes. It strictly adheres to RFC 4180 standards: any text containing commas, line breaks, or double quotes is properly enclosed in quotation marks, with internal quotes escaped as `""`.
Is my data uploaded to any server during conversion? ▾
No. All parsing and conversion are executed entirely in your web browser via client-side JavaScript. Confidential databases and customer records remain strictly private.

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