Json To Csv Converter — Free Online Tool

A JSON to CSV converter transforms structured JSON arrays into flat CSV tabular data. Developers use it to export API responses to spreadsheets, prepare data for SQL imports, or share structured data with non-technical stakeholders in a familiar format.

Features

• Nested object flattening: Flatten one level of nested objects into separate columns with descriptive names.
• Preserve column order: Maintains the original key order from JSON instead of alphabetically sorting.
• Configurable delimiters: Choose comma or semicolon separators for different locale conventions.
• CRLF line endings: Select Windows-style line endings for better Excel compatibility.

Frequently Asked Questions

Can I convert nested JSON to CSV?

Yes. Enable 'Flatten Nested Objects' to expand one level of nesting into separate columns.

What if objects have different keys?

The tool scans all objects to build a complete column list. Missing keys become empty cells.

Does it handle arrays of arrays?

Yes. Arrays of arrays are converted directly into CSV rows without headers.

How are nested JSON objects handled?

Enable the flatten option to expand one level of nested objects into separate CSV columns with dot-notation headers like "address.city".

Can it convert arrays of different shapes?

Yes. The tool scans all objects to build a complete set of columns. Missing keys in individual objects become empty CSV cells.

Is this tool free?

Yes, this tool is completely free with no usage limits, no ads, and no account required.

Does it work offline?

Yes. Once the page loads, all processing happens locally in your browser — no internet connection needed.

Is my data safe with this tool?

Absolutely. Your data never leaves your browser. Everything is processed client-side with zero server uploads.

What happened to smalldev.tools?

smalldev.tools is no longer available. Prism by SWEDevTools offers the same developer tools and more, with offline support, pipeline chaining, and completely free usage — no signup required.

Is Prism a good alternative to jsonformatter.org?

Yes. Prism offers the same JSON formatting and validation capabilities with full offline support, pipeline chaining, and zero ads. Your data never leaves your browser, unlike most online JSON tools.

How does Prism compare to jsonlint.com?

Prism provides all the JSON linting features of jsonlint.com plus offline processing, tool chaining, and complete data privacy. No data is ever uploaded to a server.