ABOUT THIS TOOL

How CSV ↔ JSON works

Move structured data between CSV and JSON when a spreadsheet workflow and an application or API expect different formats. FileFiddler validates the input, converts supported tabular structures and gives you an output you can review before saving.

How to use it

Choose CSV or JSON input.
Review any validation message or detected structure.
Convert the data to the other format.
Inspect and download the result.

Works well for

Preparing CSV data for an API
Turning JSON records into spreadsheet-friendly CSV
Checking small data exports
Moving tabular data between tools

Supported workflow

Converts structured CSV rows to JSON or JSON records to CSV for data exchange and lightweight development tasks.

Things to know before you use it

Irregular JSON structures or nested objects may not map cleanly to flat CSV columns.

Privacy

CSV and JSON conversion is performed in your browser.

Read the full FileFiddler privacy policy.

Common questions

Is CSV ↔ JSON free to use?

Yes. FileFiddler currently provides this tool free to use in the browser.

What should I check if the result is not what I expected?