The JSONForge Browser Extension

What the extension does

When you land on a page serving JSON (a raw API response, a JSON file, or content-type application/json), the extension detects it and renders it with the same formatter and tree viewer as the website — collapsible, syntax-highlighted, and validated. Instead of a wall of unformatted text, you get an explorable document in the tab you're already on.

The popup works the other way around: paste any JSON snippet into it and format it there, without navigating away from what you're doing. It's the fastest path when the JSON lives in your clipboard rather than on a page.

Installing it

The extension runs on Chromium-based browsers (Chrome, Edge, Brave, Arc, Opera) and installs from the Chrome Web Store — the same 'Get the extension' button in this site's header links straight to the listing. One click on 'Add to Chrome' and it works immediately; there's no account, no setup, and no permissions beyond reading the pages you explicitly open that serve JSON.

It formats locally from the moment it's installed: view any raw JSON endpoint — try a public one like the JSONPlaceholder API — and the extension offers its formatted view before the browser's default plain-text rendering takes over.

A typical debugging workflow

Open the endpoint you're debugging directly in a tab (or via the Network panel's 'open in new tab'), and the extension renders the response as a collapsible tree. Collapse everything, expand only the branch you're investigating, and use the search to jump to a key anywhere in the document. Switch to the raw view when you need to copy the exact bytes for a bug report.

Because the rendering is the same engine as the website's tree viewer, what you see in the tab matches what you'll get if you later paste the payload into any JSONForge tool — no surprises when you move from reading to converting or validating.

Extension vs. website

Reach for the extension when you're eyeballing live API responses in the browser and want instant readability without a context switch. Use the website for heavier work — conversions (YAML, CSV, TypeScript), schema validation, repair, the placeholder API — since the full toolkit lives there. They share the same engine, so results are identical.

Privacy

The extension processes JSON locally in your tab and transmits nothing: no analytics, no telemetry, and no page content leaves the browser. Its content script checks whether the page you opened is a raw JSON response; if it isn't, it does nothing further. Clipboard access happens only when you click 'Paste' in the popup. The site's privacy policy documents this behavior in detail.