JSON Viewer Online | View, Format & Validate JSON Files Free

Drop your JSON file here

or click to browse files

.json

Files up to 10MB supported

OR PASTE JSON

Compare Two JSON Objects

JSON A (Original)

JSON B (Modified)

Error message here

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data.json

0 KB

Valid JSON

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Keys: 0

Values: 0

Depth: 0

Objects: 0

Arrays: 0

How to View JSON Files

Load Your JSON - Upload a .json file, paste JSON text directly, or use the sample data to get started.

Choose View Mode - Switch between Tree view for navigation, Code view for syntax, or Table view for arrays.

Explore & Search - Expand/collapse nodes, search for keys or values, and click to copy JSON paths. Use Ctrl+F to focus search.

Format & Export - Format or minify your JSON, copy to clipboard, or download the processed file. Need CSV format? Use the Export CSV button in table view.

Features

Tree View

Navigate JSON with collapsible tree structure. Click any node to copy its JSONPath. Works great alongside our XML Viewer for comparing data formats.

Validation

Instantly validate JSON syntax with detailed error messages and line numbers. Compare two JSON objects side by side with the built-in diff tool.

100% Private

All processing happens in your browser. Your data never leaves your device - just like our other viewer tools including the Markdown Viewer and CSV Viewer.

Type Detection

Visual badges show data types: strings, numbers, booleans, arrays, objects and null values. Export tabular JSON data to CSV with a single click.

JSON Data Types

String Number Boolean Null Array Object

Frequently Asked Questions

JSON (JavaScript Object Notation) is a lightweight data interchange format. It's easy for humans to read and write, and easy for machines to parse and generate. JSON is commonly used for APIs, configuration files, and data storage. If you work with other data formats, check out our XML Viewer and CSV Viewer as well.

Common JSON errors include: missing commas between items, trailing commas after last items, single quotes instead of double quotes, unquoted keys, and missing closing brackets. This viewer highlights the error location to help you fix issues quickly.

JSON is more compact and easier to read than XML. JSON uses key-value pairs and arrays, while XML uses tags. JSON is native to JavaScript and preferred for web APIs. XML supports attributes, comments, and namespaces which JSON doesn't have. You can explore XML files with our XML Viewer.

Yes, files up to 10MB are supported. For very large files, the tree view uses lazy rendering for smooth performance. You can also collapse nodes to reduce memory usage and use the search function to find specific data quickly.

Absolutely. All JSON processing happens entirely in your browser using JavaScript. Your data is never uploaded to any server. This makes it safe to view sensitive configuration files, API responses, or any confidential data.

Yes! When viewing an array of objects, switch to Table view and use the "Export CSV" button to download your data as a CSV file. You can then open it with our CSV Viewer or any spreadsheet application.

Ctrl+F to focus search, Ctrl+S to download, Enter/Shift+Enter to navigate search results, and Escape to close the editor and return to upload. These shortcuts work the same way in all our online tools.