Format, repair, validate, and inspect JSON with beautiful syntax highlighting, interactive tree view, and powerful developer tools. Everything runs locally in your browser.
{
"id": 42,
"name": "Ada Lovelace",
"roles": [
"admin",
"engineer"
],
"active": true
}A focused toolkit built for engineers who live in API responses.
Beautify unreadable JSON instantly with pixel-perfect indentation.
Automatically fixes trailing commas, unquoted keys, and other syntax slip-ups.
Navigate deeply nested objects with collapsible, searchable nodes.
Convert URL parameters into clean, structured JSON in one click.
Save reusable payloads locally and reload them whenever you need.
Automatically enhances raw JSON pages you visit in Chrome.
A theme for every workspace. Switch instantly, remembers your choice.
Everything runs locally. No servers. No tracking. Ever.
Pretty printing, tree navigation, syntax highlighting, and a floating popup — all in one extension.
{
"order_id": 1024,
"customer": {
"id": 7,
"name": "Grace Hopper",
"vip": true
},
"items": [
{ "sku": "A-100", "qty": 2 },
{ "sku": "B-220", "qty": 1 }
],
"total": 129.90,
"currency": "USD"
}One click from the Chrome Web Store. No account, no setup.
Raw API responses are auto-formatted with syntax highlighting.
Explore, repair, save snippets, and share formatted output.
Install JSON Debugger and turn every raw JSON page into a proper workspace.