Free Online JSON Viewer
Use this free online JSON Viewer to paste raw JSON, format it in the same editor, and explore the result in a clean collapsible tree. It is designed for developers, QA engineers, API testers, support teams, data analysts, and anyone who needs to quickly understand a JSON response without installing a browser extension or signing in.
The JSON Viewer includes two simple work modes. The Text tab works like a large JSON editor where you can paste unformatted JSON, click Format to beautify it, remove white space to minify it, copy the result, clear the editor, or load a local JSON file. The Viewer tab turns valid JSON into a tree structure with expandable objects and arrays, plus a name/value table for quick scanning.
This page is useful when debugging REST APIs, webhook payloads, Firebase data, configuration files, analytics exports, app logs, and third-party service responses. Your JSON is processed in the browser for fast feedback, and the interface stays focused on the task: paste, format, inspect, and copy.
Key Features
When to Use This JSON Viewer
How to Use the JSON Viewer
- 1. Open the Text tab and paste your JSON into the large editor. You can paste a JSON object, JSON array, or a long response copied from an API tool.
- 2. Click Format to beautify the JSON in the same editor. If the JSON is invalid, read the validation message, fix the syntax, and click Format again.
- 3. Switch to the Viewer tab to inspect the JSON as an expandable tree. Open and close nested objects or arrays to understand the structure without scrolling through raw text.
- 4. Use the name/value table on the right side to scan top-level keys, primitive values, array indexes, and object summaries faster.
- 5. Click Copy to copy the current JSON text, use Remove white space to minify it, or download the formatted JSON when you need a local file.
JSON Viewer FAQ
What is a JSON Viewer?
A JSON Viewer is a tool that takes JSON text and displays it in a readable format. It usually includes formatting, validation, and a tree view so you can expand objects and arrays instead of reading one long line of JSON.
Can I format JSON in the same editor?
Yes. Paste JSON in the Text tab and click Format. The tool beautifies the JSON directly inside the same editor, so you do not need to copy from a separate output box.
Does this JSON Viewer support a collapsible tree?
Yes. After valid JSON is entered, open the Viewer tab to browse the JSON as a collapsible tree with expandable objects and arrays.
Can I minify JSON with this tool?
Yes. Use the Remove white space button to convert formatted JSON into compact minified JSON. You can then copy the minified result.
Is my JSON uploaded to a server?
The tool is designed to run in the browser for quick viewing and formatting. As a best practice, avoid pasting production secrets, private tokens, passwords, or sensitive customer data into any online tool.
What JSON errors can this tool detect?
The viewer validates JSON with the browser JSON parser and shows parsing errors such as missing commas, extra trailing commas, unquoted keys, invalid strings, and broken brackets or braces.