JSON viewer

Auto-repair JSON Viewer — Format, fix, and explore instantly

Clean messy JSON with automated repairs, visualize the structure side by side, and export tidy payloads without sending data anywhere.

Launch JSON workspaceRuns 100% in your browser — perfect for sensitive data.

Editor

Interactive JSON Workspace

Paste JSON payloads, auto repair common mistakes, and prettify the output before sharing.

Sort keys alphabetically

Validated at 06:17:02 AM — keys sorted

JSON Viewer

Search nodes or expand everything to audit nested data.

description:"Fast, private JSON formatting directly in your browser."
featuresArray(3)
statisticsObject
title:"Secure JSON Viewer"

Formatted JSON

Copy or download the cleaned payload.

{
  "title": "Secure JSON Viewer",
  "description": "Fast, private JSON formatting directly in your browser.",
  "features": [
    {
      "name": "Pretty Print",
      "enabled": true
    },
    {
      "name": "Tree View",
      "enabled": true
    },
    {
      "name": "Clipboard",
      "enabled": true
    }
  ],
  "statistics": {
    "requests": 128,
    "responseTimeMs": 42.5,
    "success": true,
    "regions": [
      "us-east",
      "eu-west",
      "ap-south"
    ],
    "lastUpdated": "2025-02-14T10:15:00Z"
  }
}

About This JSON Viewer & Formatter

This Free JSON Formatter and Validator is built to help developers seamlessly clean, parse, and structure JSON data. Whether you are debugging API responses, formatting minified payloads, or trying to find a specific key within a deeply nested object, this tool processes everything instantly in your browser.

Who is it for?

Software Engineers: Format ugly JSON strings into readable, syntax-highlighted code.
QA Testers: Quickly validate whether an API response is well-formed.
Data Scientists: Extract and view nested JSON configurations without writing custom scripts.

Common Use Cases

Auto-Repairing JSON: Fix common syntax errors like missing quotes around keys or trailing commas.
Minification: Compress a JSON payload into a single line to reduce size before sending it in a network request.
Sorting Keys: Sort JSON keys alphabetically to make large configuration files easier to scan and compare.

Frequently Asked Questions (FAQ)

Is my JSON data stored on your servers?

No. All parsing, validation, and formatting happens entirely locally in your browser. No data is sent over the network, making it safe for proprietary or sensitive API payloads.

Can it handle very large JSON files?

Yes, the tree viewer is optimized to handle large objects. You can also use the search function to instantly find a specific key or value.

Does it support JSON with comments?

Standard JSON does not support comments, but our Auto-Repair feature will attempt to sanitize and format invalid JSON strings.

Related Developer Tools

Explore our other tools to speed up your development workflow:

Text Difference Checker - Compare two JSON strings or code blocks to see what changed.
Git Cheat Sheet - Quickly reference essential Git commands.
Docker Cheat Sheet - Find Docker commands for managing containers and volumes.

Why teams rely on this JSON formatter

Instant repairs
Fix trailing commas, missing quotes, and other common mistakes with a single click before validating.
Side-by-side clarity
Type or paste JSON on the left and audit the tree view plus formatted output on the right in real time.
Secure by design
Everything runs locally so sensitive API payloads, logs, or configs never touch a server.
Export-ready JSON
Download or copy prettified JSON with one click for debugging, documentation, or sharing with teammates.

Frequently asked questions

Is Secure JSON Viewer safe for sensitive data?: Yes. Every action happens in your browser, so JSON never leaves your device. It is a secure JSON viewer for private payloads.
Can I minify or prettify JSON with this tool?: Absolutely. Use the Format & Validate button to pretty-print JSON or Minify JSON for compact output.
Does the viewer support large JSON files?: The tree view is optimized for quick navigation with expand and collapse controls, search, and copy/download actions.

JSON formatting quick guide

Paste JSON into the editor or start with the included sample payload.
Use Auto repair JSON to fix missing quotes, trailing commas, or other common errors.
Click Format & Validate to prettify while sorting keys when needed.
Explore the JSON tree with search, expand, and collapse controls.
Copy or download the cleaned JSON for documentation or API testing.

{
  "title": "Secure JSON Viewer",
  "description": "Fast, private JSON formatting directly in your browser.",
  "features": [
    {
      "name": "Pretty Print",
      "enabled": true
    },
    {
      "name": "Tree View",
      "enabled": true
    },
    {
      "name": "Clipboard",
      "enabled": true
    }
  ],
  "statistics": {
    "requests": 128,
    "responseTimeMs": 42.5,
    "success": true,
    "regions": [
      "us-east",
      "eu-west",
      "ap-south"
    ],
    "lastUpdated": "2025-02-14T10:15:00Z"
  }
}