JSON ↔ CSV Converter
Convert between JSON and CSV.
Runs in browser
Convert JSON to CSV and CSV to JSON directly in the browser. Supports custom delimiters, file upload, and data validation.
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About the JSON ↔ CSV converter
This tool allows you to convert data between JSON and CSV formats quickly and efficiently. JSON → CSV accepts an array of objects; columns will be the union of keys found in all objects. CSV → JSON analyzes quoted fields, respects the chosen delimiter and can use the first line as header.
How to use
- Choose the conversion direction (JSON → CSV or CSV → JSON).
- Select the appropriate delimiter (comma, semicolon, tab or pipe).
- For CSV → JSON, indicate if the first line contains headers.
- Paste the data or upload a file (.json or .csv).
- Click Convert and use the buttons to copy or download the result.
Frequently asked questions
Can I convert large files?
Processing is done in the browser, so there are memory limitations. For very large files, consider splitting into smaller parts.
Is data sent to the server?
No. All conversion is done locally in your browser — no data is sent to the server.
What delimiters are supported?
The tool supports comma, semicolon, tabulation and pipe. It is also possible to define a custom delimiter.