{ } JSON Formatter & Viewer
Format, validate, and browse JSON with collapsible tree view.
👉 Use JSON Formatter & Viewer OnlineHow to Use JSON Formatter & Viewer
- Paste your JSON into the editor, or load it from a URL.
- Click Format & View to validate and pretty-print it.
- Browse the collapsible tree view, filter nodes, and copy the result.
Features
- Instant results — everything is processed in real time in your browser.
- 100% free — no sign-up, no paywall, no usage limits.
- Private by design — your text, files, and data never leave your device.
- Works everywhere — any modern browser on desktop, tablet, or mobile.
Why DevToolBox
DevToolBox is a collection of free online developer tools built as a pure front-end application. Everything runs locally in your browser, so your data is never uploaded to any server. No sign-up, no installation, no usage limits — just open the page and use the tool.
FAQ
Is JSON Formatter & Viewer free?
Yes, JSON Formatter & Viewer is 100% free to use — no sign-up, no subscription, and no usage limits.
Is my data uploaded?
No. Everything is processed locally in your browser, so your data is never uploaded to any server.
Do I need to install anything?
No. JSON Formatter & Viewer runs directly in your browser — no downloads, no plugins, and no account required.