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Convert JSON to CSV instantly in your browser. Paste, upload, or fetch from URL. Supports nested objects, JSONLines, custom delimiters.

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Website, pricing, platforms and company facts side by side.
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| Website | jsontocsvtool.com | diffee.me |
| Pricing | — | |
| Company | Startup from China · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


JsonToCsvTool converts JSON into CSV entirely inside your browser. You can paste a JSON object, an array of objects, an array of arrays, or JSONLines / NDJSON. Nested objects can be flattened into dot notation columns such as user.address.city. Output options include a custom delimiter, and the...
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As answered by people managing JsonToCsvTool and Diffee.
JsonToCsvTool's answer
Most online converters upload your file to their server. JsonToCsvTool does the whole conversion inside your browser, so nothing leaves your device, there is no signup and no usage cap. It also handles the shapes people actually meet in the wild: nested objects flattened into dot notation columns, arrays of objects and JSONLines / NDJSON.
JsonToCsvTool's answer
Because the data never leaves your machine. You can disconnect from the internet after the page loads and the converter still works. There is no account, no queue and no upload limit beyond your own browser memory, and the options that matter are not hidden behind a signup: nested flattening, a custom delimiter and support for JSONLines.
JsonToCsvTool's answer
Developers and data professionals. People who receive JSON from an API, a log file or a data export and need it as a spreadsheet or as input to a CSV pipeline. Also analysts doing one-off cleanups who do not want to install a desktop tool for a single conversion.
JsonToCsvTool's answer
Converting JSON to CSV is one of those chores that comes up constantly when working with APIs. Most free converters either upload your data or hide the useful options behind a signup, so I built one that runs entirely in the browser, stays free, and exposes the options that actually matter.
JsonToCsvTool's answer
Plain HTML, CSS and JavaScript that run in the visitor's browser. The site itself is a static site served from Cloudflare. There is no backend and no server-side processing, so there is nothing to store.
JsonToCsvTool's answer
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