Paste JSON → Format, validate, explore tree view, copy paths.
The JSON Viewer is a free online tool for parsing, formatting, validating, and exploring JSON data directly in your browser. Whether you are debugging an API response, inspecting a configuration file, or learning JSON structure, this tool provides everything you need without sending your data to any server.
Paste your raw or minified JSON into the input area and click "Format" (or "Beautify"). The tool will re-indent your JSON with proper spacing and line breaks, making it easy to read. If your JSON contains syntax errors, the tool will highlight the issue and show an error message with approximate location information so you can fix it quickly.
Click the "Minify" button to compress your JSON by removing all unnecessary whitespace, line breaks, and indentation. This is useful when you need to reduce file size for API payloads, storage, or transmission. The minified output is valid JSON that can be copied and used directly.
The tree view presents your JSON data as a collapsible, nested hierarchy. Click on any object or array node to expand or collapse it. This makes it easy to navigate complex, deeply nested structures without scrolling through hundreds of lines of text. Each node shows its key name, data type, and a preview of its value.
When hovering over a value in tree view, the full JSON path is displayed. Click the path label to copy it to your clipboard. This is particularly useful when you need to reference specific fields in code, documentation, or debugging conversations. Paths follow standard dot notation (e.g., data.users[0].name).
All processing happens entirely in your browser. No data is transmitted to any external server. You can safely paste API keys, authentication tokens, or sensitive configuration data — nothing leaves your machine. The tool works offline once loaded and handles files of virtually any size, though very large documents (10MB+) may be slower depending on your browser and device.