Is my JSON sent to a server?

No. The editor runs entirely in your browser; your data stays on your device.

What is the difference from the JSON formatter?

The formatter pretty-prints or minifies text. The editor lets you change values in a tree or code view.

Yes. Tree mode expands objects and arrays so you can edit fields individually.

Invalid JSON shows an error when you load or export; fix syntax before copying.

Yes. Use the mode menu in the editor toolbar after loading valid JSON.

Very large documents may slow the browser, but nothing is uploaded to Frespy.

在树形或代码视图中编辑、验证 JSON。

Paste JSON

以树形视图可视化编辑 JSON，需要精确控制时可切换到原始代码。语法校验在复制到应用或 API 客户端前就能发现错误。

使用方法

常见问题

Is my JSON sent to a server?: No. The editor runs entirely in your browser; your data stays on your device.
What is the difference from the JSON formatter?: The formatter pretty-prints or minifies text. The editor lets you change values in a tree or code view.
Can I edit nested objects?: Yes. Tree mode expands objects and arrays so you can edit fields individually.
Does it validate JSON?: Invalid JSON shows an error when you load or export; fix syntax before copying.
Can I switch between tree and code?: Yes. Use the mode menu in the editor toolbar after loading valid JSON.
Is there a size limit?: Very large documents may slow the browser, but nothing is uploaded to Frespy.