JSON Viewer / Formatter
Edit two JSON documents side by side and compare changes instantly.
Left JSON
Right JSON
Ready.
Diff Result (Left → Right)
Collapsible Tree View
About This Tool
The JSON Viewer / Formatter helps you inspect, format, compare, and validate JSON entirely in the browser. Use it for API responses, configuration files, logs, payload diffs, and tree-style inspection when nested objects get too large to read comfortably in plain text.
It supports side-by-side editing, fold and unfold controls, import and download actions, and a tree view for fast navigation through nested JSON structures. Diff output makes it easy to spot added, removed, and changed values between two documents.
This page is designed for developers who work with APIs, webhooks, content pipelines, and automation scripts. Everything runs locally in your browser, so sensitive JSON never needs to be uploaded to a server.
Common use cases include validating API payloads before deployment, comparing staging and production responses, and formatting compact JSON into readable, indented output for debugging.
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