When to convert between JSON and CSV
CSV is great for spreadsheets, JSON for APIs and code. This tool converts a flat array of objects to CSV columns, and CSV rows back into JSON objects.
JSON ↔ CSV Converter
Switch between JSON and CSV in one click — paste an array of objects or a CSV table.
How it works
- 1
Paste your input into the editor.
- 2
Choose format / mode options if available.
- 3
Copy the transformed output (it usually updates as you edit).
Why use this tool
- Runs entirely in your browser — nothing is uploaded to a server.
- 100% free, no sign-up, no limits.
- Works in any modern browser — no app install, no extension, no account.
How to use JSON ↔ CSV Converter
Paste into JSON ↔ CSV Converter, tweak options, and copy the output. Formatting and conversion run in the browser for this tool.
Tips for better results
Keep a backup of original input before bulk transforms. Invalid input should show an error instead of silent corruption.
Privacy and offline-friendly processing
Whenever possible, JSON ↔ CSV Converter processes your data locally with JavaScript in this page. That means drafts, secrets, and unfinished work stay on your device by default. Prefer this workflow when you do not want to upload sensitive text, tokens, passwords, or files to a third-party service.
Frequently asked questions
Does it support nested JSON objects?
It works best with flat objects; nested values are converted to their string representation.
What CSV delimiter is used?
Commas, with proper quoting for values containing commas or quotes.
Is my data uploaded when I use this tool?
For most FlyUtils tools, no. Processing happens in your browser with JavaScript. If a tool ever needs a server, that will be stated clearly on the page.
Is JSON ↔ CSV Converter free to use?
Yes. JSON ↔ CSV Converter is free, with no sign-up and no artificial usage caps for normal personal and work use.
Does JSON ↔ CSV Converter work on mobile?
Yes. The page is mobile-first, so you can paste input, tweak options, and copy results from a phone or tablet.