Free JSON to CSV Converter that works offline
Create spreadsheet-friendly CSV from a JSON array without sending records to a server. The converter gathers every property name found across the objects so later rows do not lose additional fields.
What this json to csv converter does
CSV needs one flat value per cell, while JSON can contain nested structures. Primitive values are converted directly and nested values are serialized as compact JSON. Delimiters, quotes and line breaks are escaped according to common CSV rules.
How to use the JSON to CSV Converter
- Enter or paste a JSON array containing one or more objects into the tool.
- Adjust the available options so they match the format and result you need.
- Choose Convert JSON to CSV and review header and data rows with correctly quoted values before using it.
- Copy or download the result, then clear the page if the input was sensitive.
Common uses
- Exporting API samples to a spreadsheet
- Reviewing JSON records in tabular form
- Creating comma or semicolon-delimited reports
- Converting local fixtures for another application
Private processing and offline access
This tool does not submit your input to a conversion server. Processing takes place inside the browser using local JavaScript and standard Web APIs. After the PWA has been installed or cached, the page and its core features remain available without an internet connection. Closing or clearing the page removes unsaved input; the tool does not create an account or cloud history.
Tips for accurate results
- Flatten deeply nested objects first if separate columns are required.
- Choose semicolons for software configured to use comma decimals.
- CSV has no native data types, so imported applications may infer values differently.
Frequently asked questions
Does this tool upload my data?
No. JSON to CSV Converter processes its input in the current browser and does not submit it to a conversion API.
What input does the JSON to CSV Converter accept?
The top-level value must be an array of objects. Nested objects and arrays are kept as compact JSON inside the corresponding CSV cell.
Can I use this tool offline?
Yes. Once the Offline Tools PWA has cached the page, the core feature works without an internet connection.