APIs and exported data often come as JSON, but spreadsheets and many data tools expect CSV. This tool takes a JSON array of flat objects and converts it into properly formatted CSV, using the keys from the first object as column headers.
It handles the common case of a flat array of similarly-shaped objects well; deeply nested JSON structures would need to be flattened first, since CSV itself has no concept of nested data.
The result is ready to copy directly into a spreadsheet application or save as a .csv file for import elsewhere.
Because everything runs locally in your browser, results appear instantly and nothing you type or upload is ever sent to a server.
Bookmark this page if you expect to use this tool regularly — it loads fast and behaves the same way every time, with no account needed.
This kind of task shows up constantly in everyday writing, coding, design, and admin work, which is exactly why a dedicated, focused tool saves so much back-and-forth.
A tool that does one job well, without a cluttered interface or unrelated features competing for attention, tends to be faster to use than a heavier all-in-one app.
If you find yourself needing this conversion or calculation often, keeping this page open in a tab is usually faster than digging through a bigger software suite's menus.
Because there's no sign-up or installation step, you can jump straight from search result to working tool in a couple of seconds.
This page works the same way on a phone, tablet, or desktop browser, so switching devices doesn't mean relearning a different interface.
Unlike a heavier desktop application, there's nothing to download, update, or configure before you can start using this tool.
Frequently asked questions
What if my JSON objects have different keys?
The tool uses the keys from the first object as headers; objects missing a given key will show an empty value in that column.
Does this handle nested objects or arrays as values?
Nested structures are converted to their JSON string representation within the cell, since CSV doesn't support true nested data.