JSON to CSV Converter
Convert between JSON and CSV formats online for free — with a choice of delimiters and header handling, instantly inside your browser.
What does this converter do?
JSON and CSV are two of the most common ways data gets passed between tools — JSON as an array of objects for APIs and config files, CSV as flat rows and columns for spreadsheets and database exports. This converter moves data between the two formats in either direction: turning a JSON array into a CSV table with a header row of column names, or turning a CSV file back into an array of JSON objects keyed by those same column names.
It's built for anyone moving data between a spreadsheet and an API, exporting a JSON response into something Excel or Google Sheets can open, or importing a CSV export into a format an application expects.
GuideHow to use it
How the conversion works
Converting JSON to CSV collects every key used across all objects in the array into a single set of column headers, then writes one row per object, quoting any value that contains the delimiter, a quote character, or a line break. Converting CSV to JSON parses the CSV respecting quoted fields — including quoted values that contain the delimiter itself — and, with "Headers" turned on, uses the first row as the property names for every resulting object. With "Headers" off, generic column names like column1, column2 are used instead, and the first row is treated as data rather than column names.
Why it helpsFeatures & benefits
Why this runs entirely in your browser
Spreadsheets and API payloads often carry real customer or business data, so nothing is uploaded. Every conversion runs in JavaScript locally in the tab, which means it keeps working offline once the page has loaded and nothing pasted or uploaded into it persists after the tab is closed.
Common uses
Exporting an API's JSON response into a CSV a spreadsheet can open, converting a CSV export from a database or analytics tool into JSON for a script, or reformatting a data file to match what a downstream system expects.
Frequently asked questions
A few things people usually want to know before trusting the numbers.
The CSV header row includes every key found across all objects. Objects missing a particular key get an empty value in that column.
Yes, as long as the field is properly quoted in the source CSV — the parser respects quoted values, including ones containing the chosen delimiter.
For CSV → JSON, every row (including the first) is treated as data, and generic column names are used instead. For JSON → CSV, the header row is omitted from the output entirely.
Yes. Choose semicolon, tab, or pipe from the Delimiter dropdown — useful for regions or tools that expect a different separator than a comma.
No. All conversion happens locally in your browser. Nothing typed, pasted, or uploaded here is sent to a server, stored, or shared.