JSON to CSV Converter — Free Online Tool

The JSON to CSV Converter flattens an array of JSON objects into a comma-separated table with a header row, so data from an API response or an export can be opened in Excel, Google Sheets, or any tool that expects tabular input. Keys across the objects are collected into columns and each object becomes a row.

The interesting part is what happens to data that does not fit a flat table, because JSON is a tree and CSV is a grid. Nested objects have to be flattened into dotted column names such as address.city, and arrays inside a record have to be either joined into one cell or expanded into numbered columns — neither is lossless in the way a round trip back to JSON would need. If your records have deeply nested or variable-length structures, expect the CSV to be a usable view of the data rather than a perfect representation of it.

Records that do not share the same keys are the other common case: the converter takes the union of all keys as the header and leaves cells empty where a record did not have that field, which is usually what you want from an API returning optional fields.

Escaping is handled for you — values containing commas, quotes, or line breaks are quoted properly, which is the detail that most hand-rolled conversions get wrong and only discover when a spreadsheet column shifts halfway down the file.

Conversion runs in your browser; the data you paste is never uploaded.

Our JSON to CSV Converter is completely free to use with no signup required. For this tool, processing runs in your browser — your files and data stay on your device and are not uploaded to our servers.

Whether you are a developer, designer, student, or business owner, this tool is designed to save you time and make your workflow more efficient. Bookmark this page to access it whenever you need it — it will always be free.