JSON viewer.
Paste on the left, browse and edit on the right. Click a key or value to change it. Changes flow both ways. Nothing leaves your browser.
Tree click to edit · + add · × delete
Waiting for valid JSON.
About this tool
The tree is a live view of the parsed document. Click any value to edit it: type a JSON literal such as 42, true, null, "text" or {} and it becomes that type; anything that is not valid JSON is kept as a string. Click a key to rename it (order is preserved, duplicates are refused). Hover a row for add, copy and delete. Enter commits, Escape cancels.
Large documents start folded past the first level to keep things responsive. Format, Minify and Sort keys rewrite the source; Copy puts the current document on your clipboard. Everything runs in the page, so sensitive payloads never touch a server.